drm/amdgpu: Clean up errors in atom-bits.h

Fix the following errors reported by checkpatch:

ERROR: space prohibited before that ',' (ctx:WxV)
Signed-off-by: chenxuebing <chenxb_99091@126.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/include/atom-bits.h

@@ -33,7 +33,7 @@ static inline uint8_t get_u8(void *bios, int ptr)
 #define CU8(ptr) get_u8(ctx->bios, (ptr))
 static inline uint16_t get_u16(void *bios, int ptr)
 {
-    return get_u8(bios ,ptr)|(((uint16_t)get_u8(bios, ptr+1))<<8);
+    return get_u8(bios, ptr)|(((uint16_t)get_u8(bios, ptr+1))<<8);
 }
 #define U16(ptr) get_u16(ctx->ctx->bios, (ptr))
 #define CU16(ptr) get_u16(ctx->bios, (ptr))