sh: Assure end of U-Boot is at 8-byte aligned offset

Make sure the end of U-Boot is at 8-byte aligned offset, not 4-byte
aligned offset. This allows safely appending DT at the end of U-Boot
with the guarantee that the DT will be at 8-byte aligned offset. This
8-byte alignment is now checked by newer libfdt 1.7.2 .

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>

arch/sh/cpu/u-boot.lds

@@ -72,6 +72,7 @@ SECTIONS
 
 	__u_boot_list : {
 		KEEP(*(SORT(__u_boot_list*)));
+		. = ALIGN(8);
 	} >ram
 
 	PROVIDE (__init_end = .);
@@ -83,7 +84,7 @@ SECTIONS
 	.bss :
 	{
 		*(.bss)
-		. = ALIGN(4);
+		. = ALIGN(8);
 	} >ram
 	PROVIDE (bss_end = .);
 	PROVIDE (__bss_end = .);