riscv: default enable xtheadc

Signed-off-by: Han Gao <gaohan@iscas.ac.cn>

.github/workflows/kernel.yml

@@ -67,12 +67,8 @@ jobs:
                   make revyos_beaglev_defconfig
                 fi
                 export KDEB_PKGVERSION="$(date "+%Y.%m.%d.%H.%M")+$(git rev-parse --short HEAD)"
-                if [ x"${{ matrix.name }}" = x"gcc-13" ]; then
-                  echo "CONFIG_THEAD_ISA=n" >> .config
-                elif [ x"${{ matrix.name }}" = x"thead-gcc" ]; then
-                  echo "CONFIG_THEAD_ISA=y" >> .config
-                fi
                 sed -i '/CONFIG_LOCALVERSION_AUTO/d' .config && echo "CONFIG_LOCALVERSION_AUTO=n" >> .config
+                cat .config | grep "CONFIG_THEAD_ISA"
                 make -j$(nproc) bindeb-pkg LOCALVERSION="-${{ matrix.board }}"
 
                 # Copy deb

arch/riscv/Kconfig

@@ -405,7 +405,9 @@ config VECTOR
 
 config THEAD_ISA
 	bool "T-HEAD extension ISA in AFLAGS with -march=_xtheadc"
-	default n
+	default y
+	help
+	  Say N here if you want to disable xtheadc in the kernel.
 
 endmenu