Update massdrop/alt and arm_atsam/led_matrix to fix qmk#10813 (qmk#10818

)

* Update massdrop/alt keyboard to fix Caps Lock LED flickering.

* Fix Caps-lock LED during underglow-only for massdrop/ctrl

* Update keyboards/massdrop/ctrl/keymaps/default/keymap.c

tmk_core/protocol/arm_atsam/led_matrix.c

@@ -311,9 +311,11 @@ void led_matrix_indicators(void) {
                 (led_map[i].scan == USB_LED_KANA_SCANCODE && (kbled & (1 << USB_LED_KANA))) ||
 #endif  // KANA
                 (0)) {
-                led_buffer[i].r = 255 - led_buffer[i].r;
-                led_buffer[i].g = 255 - led_buffer[i].g;
-                led_buffer[i].b = 255 - led_buffer[i].b;
+                if (rgb_matrix_get_flags() & LED_FLAG_INDICATOR) {
+                    led_buffer[i].r = 255 - led_buffer[i].r;
+                    led_buffer[i].g = 255 - led_buffer[i].g;
+                    led_buffer[i].b = 255 - led_buffer[i].b;
+                }
             }
         }
     }