firmware: arm_ffa: Move comment before the field it is documenting

This is consistent with the other comments in the struct.

Co-developed-by: Andrew Walbran <[email protected]>
Signed-off-by: Andrew Walbran <[email protected]>
Signed-off-by: Quentin Perret <[email protected]>
Reviewed-by: Sudeep Holla <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Will Deacon <[email protected]>

Author: willdeacon

include/linux/arm_ffa.h

@@ -244,11 +244,11 @@ struct ffa_mem_region_attributes {
 	 */
 #define FFA_MEM_RETRIEVE_SELF_BORROWER	BIT(0)
 	u8 flag;
-	u32 composite_off;
 	/*
 	 * Offset in bytes from the start of the outer `ffa_memory_region` to
 	 * an `struct ffa_mem_region_addr_range`.
 	 */
+	u32 composite_off;
 	u64 reserved;
 };