Main: only enable 48MHz clock generator when USB is enabled

main_fw/atmel_start_prj/config/hpl_gclk_config.h

@@ -159,7 +159,11 @@
 // <i> Indicates whether generic clock 2 configuration is enabled or not
 // <id> enable_gclk_gen_2
 #ifndef CONF_GCLK_GENERATOR_2_CONFIG
+#ifdef USB_ENABLE
 #define CONF_GCLK_GENERATOR_2_CONFIG 1
+#else
+#define CONF_GCLK_GENERATOR_2_CONFIG 0
+#endif
 #endif
 
 // <h> Generic Clock Generator Control
@@ -167,7 +171,11 @@
 // <i> Indicates whether Run in Standby is enabled or not
 // <id> gclk_arch_gen_2_RUNSTDBY
 #ifndef CONF_GCLK_GEN_2_RUNSTDBY
+#ifdef USB_ENABLE
 #define CONF_GCLK_GEN_2_RUNSTDBY 1
+#else
+#define CONF_GCLK_GEN_2_RUNSTDBY 0
+#endif
 #endif
 
 // <q> Divide Selection
@@ -202,7 +210,11 @@
 // <i> Indicates whether Generic Clock Generator Enable is enabled or not
 // <id> gclk_arch_gen_2_enable
 #ifndef CONF_GCLK_GEN_2_GENEN
+#ifdef USB_ENABLE
 #define CONF_GCLK_GEN_2_GENEN 1
+#else
+#define CONF_GCLK_GEN_2_GENEN 0
+#endif
 #endif
 
 // <y> Generic clock generator 2 source