staging: gasket: apex_clock_gating simplify logic, reduce indentation

Collapse together two checks and return immediately, avoid conditional
indentation for most of function code.
Reported-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Simon Que <sque@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gasket/apex_driver.c

@@ -666,15 +666,13 @@ static long apex_clock_gating(struct gasket_dev *gasket_dev, ulong arg)
 {
 	struct apex_gate_clock_ioctl ibuf;
 
-	if (bypass_top_level)
+	if (bypass_top_level || !allow_sw_clock_gating)
 		return 0;
 
-	if (allow_sw_clock_gating) {
 	if (copy_from_user(&ibuf, (void __user *)arg, sizeof(ibuf)))
 		return -EFAULT;
 
-		gasket_log_error(
-			gasket_dev, "%s %llu", __func__, ibuf.enable);
+	gasket_log_error(gasket_dev, "%s %llu", __func__, ibuf.enable);
 
 	if (ibuf.enable) {
 		/* Quiesce AXI, gate GCB clock. */
@@ -693,7 +691,6 @@ static long apex_clock_gating(struct gasket_dev *gasket_dev, ulong arg)
 		    gasket_dev, APEX_BAR_INDEX,
 		    APEX_BAR2_REG_AXI_QUIESCE, 0x0, 1, 16);
 	}
-	}
 	return 0;
 }