qcom: scm-boot: Fix definitions when MSM_SCM is not defined

When config MSM_SCM is not defined the alternate definitions of the
functions cause a compile error if they are not static inlined.
This patch makes them static inline.

Change-Id: I8c6e615b950be9d12d922441519d0f3b1327ba2d
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>