arm64/fp: Reindent fpsimd_save()

Currently all the active code in fpsimd_save() is inside a check for
TIF_FOREIGN_FPSTATE. Reduce the indentation level by changing to return
from the function if TIF_FOREIGN_FPSTATE is set.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20211019172247.3045838-2-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>

arch/arm64/kernel/fpsimd.c

@@ -308,24 +308,26 @@ static void fpsimd_save(void)
 	WARN_ON(!system_supports_fpsimd());
 	WARN_ON(!have_cpu_fpsimd_context());
 
-	if (!test_thread_flag(TIF_FOREIGN_FPSTATE)) {
-		if (IS_ENABLED(CONFIG_ARM64_SVE) &&
-		    test_thread_flag(TIF_SVE)) {
-			if (WARN_ON(sve_get_vl() != last->sve_vl)) {
-				/*
-				 * Can't save the user regs, so current would
-				 * re-enter user with corrupt state.
-				 * There's no way to recover, so kill it:
-				 */
-				force_signal_inject(SIGKILL, SI_KERNEL, 0, 0);
-				return;
-			}
-
-			sve_save_state((char *)last->sve_state +
-						sve_ffr_offset(last->sve_vl),
-				       &last->st->fpsr);
-		} else
-			fpsimd_save_state(last->st);
+	if (test_thread_flag(TIF_FOREIGN_FPSTATE))
+		return;
+
+	if (IS_ENABLED(CONFIG_ARM64_SVE) &&
+	    test_thread_flag(TIF_SVE)) {
+		if (WARN_ON(sve_get_vl() != last->sve_vl)) {
+			/*
+			 * Can't save the user regs, so current would
+			 * re-enter user with corrupt state.
+			 * There's no way to recover, so kill it:
+			 */
+			force_signal_inject(SIGKILL, SI_KERNEL, 0, 0);
+			return;
+		}
+
+		sve_save_state((char *)last->sve_state +
+					sve_ffr_offset(last->sve_vl),
+			       &last->st->fpsr);
+	} else {
+		fpsimd_save_state(last->st);
 	}
 }