net: ipa: update IPA version comments in "ipa_reg.h"
Some definitions in "ipa_reg.h" are only valid for certain versions
of IPA. In such cases a comment indicates a version or range of
versions where the definition is (or is not) valid. Almost all such
cases look like "IPA vX.Y", but a few don't include the "IPA" tag.
Update these so they all consistently include "IPA". And replace
a few lines that talk about "the next bit" in the definition of the
ipa_irq_id enumerated type with a more concise comment using the
"IPA vX.Y" convention.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>