linux: allow BR2_LINUX_KERNEL_IMAGE on RISC-V

We will need to build Image files for OpenSBI so allow that now.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

linux/Config.in

@@ -258,7 +258,7 @@ config BR2_LINUX_KERNEL_SIMPLEIMAGE
 
 config BR2_LINUX_KERNEL_IMAGE
 	bool "Image"
-	depends on BR2_aarch64
+	depends on BR2_aarch64 || BR2_riscv
 
 config BR2_LINUX_KERNEL_LINUX_BIN
 	bool "linux.bin"