fix(arm): correct the SPMC_AT_EL3 condition

Addressed the SPMC_AT_EL3 condition by using '#if' instead of
'#if defined'. This change is warranted because the SPMC_AT_EL3
option is always defined.

Change-Id: I76d9b8d502f452c58bc0040745d642cbe11dc8eb
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
1 file changed