ARM: dts: msm: Use macro definitions for interrupts for SMMU

There are some preprocessor macros that represent the supported values
for the `interrupts' property.  Currently we're just hard-coding the
numerical values, which is hard to understand.  Fix this by using the
macros.

Change-Id: I18d4f79464e57ea873a7a91bdd8029d1afa33e73
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>