package/gnu-efi: enable on RISC-V 64-bit

gnu-efi RISC-V 64bit support was introduced in commit [1], first
included in version 3.0.14.

This commit adds this architecture in _ARCH_SUPPORTS.

[1] https://sourceforge.net/p/gnu-efi/code/ci/b95f138fa1550040e68ac3dd34cfce7d148d7984

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/gnu-efi/Config.in

@@ -1,6 +1,7 @@
 config BR2_PACKAGE_GNU_EFI_ARCH_SUPPORTS
 	bool
 	default y if BR2_ARM_CPU_HAS_ARM
+	default y if BR2_RISCV_64
 	default y if BR2_aarch64
 	default y if BR2_aarch64_be
 	default y if BR2_i386

package/gnu-efi/gnu-efi.mk

@@ -24,6 +24,8 @@ else ifeq ($(BR2_arm)$(BR2_armeb),y)
 GNU_EFI_PLATFORM = arm
 else ifeq ($(BR2_aarch64)$(BR2_aarch64_be),y)
 GNU_EFI_PLATFORM = aarch64
+else ifeq ($(BR2_RISCV_64),y)
+GNU_EFI_PLATFORM = riscv64
 endif
 
 GNU_EFI_MAKE_OPTS = \