dmaengine: xilinx: xdma: Fix operator precedence in xdma_prep_interleaved_dma()

dmaengine: xilinx: xdma: Fix operator precedence in xdma_prep_interleaved_dma()

Clang warns (or errors with CONFIG_WERROR=y):

  drivers/dma/xilinx/xdma.c:757:68: error: operator '?:' has lower precedence than '+'; '+' will be evaluated first [-Werror,-Wparentheses]
    757 |                 src_addr += dmaengine_get_src_icg(xt, &xt->sgl[i]) + xt->src_inc ?
        |                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^
  drivers/dma/xilinx/xdma.c:757:68: note: place parentheses around the '+' expression to silence this warning
    757 |                 src_addr += dmaengine_get_src_icg(xt, &xt->sgl[i]) + xt->src_inc ?
        |                                                                                  ^
        |                             (                                                   )
  drivers/dma/xilinx/xdma.c:757:68: note: place parentheses around the '?:' expression to evaluate it first
    757 |                 src_addr += dmaengine_get_src_icg(xt, &xt->sgl[i]) + xt->src_inc ?
        |                                                                                  ^
        |                                                                      (
    758 |                                                               xt->sgl[i].size : 0;
        |
        |                                                                                  )
  drivers/dma/xilinx/xdma.c:759:68: error: operator '?:' has lower precedence than '+'; '+' will be evaluated first [-Werror,-Wparentheses]
    759 |                 dst_addr += dmaengine_get_dst_icg(xt, &xt->sgl[i]) + xt->dst_inc ?
        |                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^
  drivers/dma/xilinx/xdma.c:759:68: note: place parentheses around the '+' expression to silence this warning
    759 |                 dst_addr += dmaengine_get_dst_icg(xt, &xt->sgl[i]) + xt->dst_inc ?
        |                                                                                  ^
        |                             (                                                   )
  drivers/dma/xilinx/xdma.c:759:68: note: place parentheses around the '?:' expression to evaluate it first
    759 |                 dst_addr += dmaengine_get_dst_icg(xt, &xt->sgl[i]) + xt->dst_inc ?
        |                                                                                  ^
        |                                                                      (
    760 |                                                               xt->sgl[i].size : 0;
        |
        |                                                                                  )

The src_inc and dst_inc members of 'struct dma_interleaved_template' are
booleans, so it does not make sense for the addition to happen first.
Wrap the conditional operator in parantheses so it is evaluated first.

Closes: https://github.com/ClangBuiltLinux/linux/issues/1971
Fixes: 2f8f90cd2f8d ("dmaengine: xilinx: xdma: Implement interleaved DMA transfers")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20231222-dma-xilinx-xdma-clang-fixes-v1-1-84a18ff184d2@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>