fix(drivers/scmi-msg): smt: fix build for aarch64
fix(drivers/scmi-msg): smt: fix build for aarch64

For AARCH64, BIT() will make the number as ULL type, let use BIT_32()
here.

And use %zu for size_t print format.

Reviewed-by: Jacky Bai <0089940041f65caa5fea86e80c360fe77360bd02@nxp.com>
Signed-off-by: Peng Fan <d3c162a96b7fb54e5d94bc77bc2c7cbbce10806f@nxp.com>
Change-Id: I1dc18d374cd2c6eb83b40b66ed6189dcc6a21728

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware