package/kodi: fix riscv build

Fixes build error not yet found by autobuilders

-- System type: Linux
CMake Error at cmake/scripts/linux/ArchSetup.cmake:42 (message):
  Unknown CPU: riscv32

using this defconfig:

BR2_riscv=y
BR2_RISCV_32=y
BR2_TOOLCHAIN_EXTERNAL=y
BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV=y
BR2_PACKAGE_KODI=y
BR2_PACKAGE_MESA3D=y
BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_SWRAST=y
BR2_PACKAGE_MESA3D_OPENGL_EGL=y
BR2_PACKAGE_MESA3D_OPENGL_ES=y
BR2_PACKAGE_PYTHON3=y
BR2_PACKAGE_PYTHON3_PY_ONLY=y

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 39886a434a121afc89cf741d0f035422a70ba524)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/kodi/kodi.mk

@@ -133,7 +133,7 @@ else ifeq ($(BR2_powerpc)$(BR2_powerpc64le),y)
 KODI_CONF_OPTS += \
 	-DWITH_ARCH=powerpc$(if $(BR2_ARCH_IS_64),64) \
 	-DWITH_CPU=powerpc$(if $(BR2_ARCH_IS_64),64)
-else ifeq ($(BR2_or1k)$(BR2_powerpc64)$(BR2_sparc64)$(BR2_sh4)$(BR2_xtensa),y)
+else ifeq ($(BR2_or1k)$(BR2_powerpc64)$(BR2_riscv)$(BR2_sparc64)$(BR2_sh4)$(BR2_xtensa),y)
 KODI_CONF_OPTS += -DWITH_ARCH=$(BR2_ARCH) -DWITH_CPU=$(BR2_ARCH)
 else
 # Kodi auto-detects ARCH, tested: arm, aarch64, i386, x86_64