QuarkPlatformPkg/PlatformSecLib: Sync Flat32.S with Flat32.asm

QuarkPlatformPkg/PlatformSecLib: Sync Flat32.S with Flat32.asm

Update Flat32.S to match Flat32.asm.  A sync was missed, so
Flat32.S is calling SecStartup instead of PlatformSecLibStartup
which is causing a boot failures with GCC builds because the
caches are not initialized correctly when the call to
PlatformSecLibStartup is not performed.

Cc: Kelly Steele <kelly.steele@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Kelly Steele <kelly.steele@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19306 6f19259b-4bc3-4df7-8a09-765794883524