platform/x86: oxpec: Rename rval to ret in tt_toggle

Rename the variable `rval` to `ret` in the function for consistency.

Signed-off-by: Antheas Kapenekakis <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Ilpo Järvinen <[e-mail]>
Signed-off-by: Ilpo Järvinen <[e-mail]>

drivers/platform/x86/oxpec.c

···
 			       size_t count)
 {
 	bool value;
-	int rval;
+	int ret;
 
-	rval = kstrtobool(buf, &value);
-	if (rval)
-		return rval;
+	ret = kstrtobool(buf, &value);
+	if (ret)
+		return ret;
 
 	if (value) {
-		rval = tt_toggle_enable();
+		ret = tt_toggle_enable();
 	} else {
-		rval = tt_toggle_disable();
+		ret = tt_toggle_disable();
 	}
-	if (rval)
-		return rval;
+	if (ret)
+		return ret;
 
 	return count;
 }