Revert "spmd: ensure SIMD context is saved/restored on SPMC entry/exit"

This reverts commit bedb13f5.
SIMD context is now saved in S-EL2 as opposed to EL3, see commit:
https://review.trustedfirmware.org/c/hafnium/hafnium/+/8321

Signed-off-by: Max Shvetsov <maksims.svecovs@arm.com>
Change-Id: Ic81416464ffada1a6348d0abdcf3adc7c1879e61

services/std_svc/spmd/spmd_main.c

@@ -109,7 +109,6 @@ uint64_t spmd_spm_core_sync_entry(spmd_spm_core_context_t *spmc_ctx)
 
 	/* Restore the context assigned above */
 	cm_el1_sysregs_context_restore(SECURE);
-
 #if SPMD_SPM_AT_SEL2
 	cm_el2_sysregs_context_restore(SECURE);
 #endif
@@ -349,18 +348,12 @@ static uint64_t spmd_smc_forward(uint32_t smc_fid,
 
 	/* Save incoming security state */
 	cm_el1_sysregs_context_save(secure_state_in);
-#if CTX_INCLUDE_FPREGS
-	fpregs_context_save(get_fpregs_ctx(cm_get_context(secure_state_in)));
-#endif
 #if SPMD_SPM_AT_SEL2
 	cm_el2_sysregs_context_save(secure_state_in);
 #endif
 
 	/* Restore outgoing security state */
 	cm_el1_sysregs_context_restore(secure_state_out);
-#if CTX_INCLUDE_FPREGS
-	fpregs_context_restore(get_fpregs_ctx(cm_get_context(secure_state_out)));
-#endif
 #if SPMD_SPM_AT_SEL2
 	cm_el2_sysregs_context_restore(secure_state_out);
 #endif