ulp: temporarily disable SOC_RISCV_COPROC_SUPPORTED for esp32c6

This commit diables SOC_RISCV_COPROC_SUPPORTED capability for esp32c6
until the feature is supported on this target.

components/soc/esp32c6/include/soc/Kconfig.soc_caps.in

@@ -27,10 +27,6 @@ config SOC_SUPPORTS_SECURE_DL_MODE
     bool
     default y
 
-config SOC_RISCV_COPROC_SUPPORTED
-    bool
-    default y
-
 config SOC_EFUSE_KEY_PURPOSE_FIELD
     bool
     default y

components/soc/esp32c6/include/soc/soc_caps.h

@@ -35,7 +35,7 @@
 // #define SOC_TEMP_SENSOR_SUPPORTED       1 // TODO: IDF-5322
 #define SOC_WIFI_SUPPORTED              1
 #define SOC_SUPPORTS_SECURE_DL_MODE     1
-#define SOC_RISCV_COPROC_SUPPORTED      1
+//#define SOC_RISCV_COPROC_SUPPORTED       1 // TODO: IDF-5816
 #define SOC_EFUSE_KEY_PURPOSE_FIELD     1
 #define SOC_EFUSE_HAS_EFUSE_RST_BUG     1
 #define SOC_RTC_FAST_MEM_SUPPORTED      1