fix(cm): save guarded control stack registers

This patch fixes a typo which led to incorrect context save
operations for two FEAT_GCS registers.

Change-Id: I3d3202a6721714bbc8f84c2d775d1b28afffa5df
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
diff --git a/lib/el3_runtime/aarch64/context_mgmt.c b/lib/el3_runtime/aarch64/context_mgmt.c
index 7a00e47..132b601 100644
--- a/lib/el3_runtime/aarch64/context_mgmt.c
+++ b/lib/el3_runtime/aarch64/context_mgmt.c
@@ -1342,8 +1342,8 @@
 	}
 
 	if (is_feat_gcs_supported()) {
-		write_el2_ctx_gcs(el2_sysregs_ctx, gcscr_el2, read_gcspr_el2());
-		write_el2_ctx_gcs(el2_sysregs_ctx, gcspr_el2, read_gcscr_el2());
+		write_el2_ctx_gcs(el2_sysregs_ctx, gcscr_el2, read_gcscr_el2());
+		write_el2_ctx_gcs(el2_sysregs_ctx, gcspr_el2, read_gcspr_el2());
 	}
 }