key: add const qualifier to key settings

Author: redchenjs

main/src/user/key.c

@@ -17,21 +17,21 @@
 #define TAG "key"
 
 #ifdef CONFIG_ENABLE_SC_KEY
-static uint8_t gpio_pin[] = {
+static const uint8_t gpio_pin[] = {
 #ifdef CONFIG_ENABLE_SC_KEY
     CONFIG_SC_KEY_PIN,
 #endif
 };
 
-static uint8_t gpio_val[] = {
+static const uint8_t gpio_val[] = {
 #ifdef CONFIG_ENABLE_SC_KEY
     0,
 #else
     1,
 #endif
 };
 
-static uint16_t gpio_hold[] = {
+static const uint16_t gpio_hold[] = {
 #ifdef CONFIG_ENABLE_SC_KEY
     CONFIG_SC_KEY_HOLD_TIME,
 #endif