sandbox64: fix: return unsigned long in readq()

make readq return unsigned long

readq should return 64-bit data

Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/cpu/cpu.c b/arch/sandbox/cpu/cpu.c
index 636d354..248d17a 100644
--- a/arch/sandbox/cpu/cpu.c
+++ b/arch/sandbox/cpu/cpu.c
@@ -230,7 +230,7 @@
 	return mentry->tag;
 }
 
-unsigned int sandbox_read(const void *addr, enum sandboxio_size_t size)
+unsigned long sandbox_read(const void *addr, enum sandboxio_size_t size)
 {
 	struct sandbox_state *state = state_get_current();
 
diff --git a/arch/sandbox/include/asm/io.h b/arch/sandbox/include/asm/io.h
index ad6c29a..31ab728 100644
--- a/arch/sandbox/include/asm/io.h
+++ b/arch/sandbox/include/asm/io.h
@@ -45,7 +45,7 @@
 /* Map from a pointer to our RAM buffer */
 phys_addr_t map_to_sysmem(const void *ptr);
 
-unsigned int sandbox_read(const void *addr, enum sandboxio_size_t size);
+unsigned long sandbox_read(const void *addr, enum sandboxio_size_t size);
 void sandbox_write(void *addr, unsigned int val, enum sandboxio_size_t size);
 
 #define readb(addr) sandbox_read((const void *)addr, SB_SIZE_8)