Fix compiler warnings for PPC systems. Update CHANGELOG.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/drivers/bios_emulator/besys.c b/drivers/bios_emulator/besys.c
index 8f1d8b2..cb1b0c1 100644
--- a/drivers/bios_emulator/besys.c
+++ b/drivers/bios_emulator/besys.c
@@ -96,7 +96,7 @@
 	else if (addr >= 0xFFFF5 && addr < 0xFFFFE) {
 		/* Return a faked BIOS date string for non-x86 machines */
 		DB(printf("BE_memaddr - Returning BIOS date\n");)
-		return BE_biosDate + addr - 0xFFFF5;
+		return (u8 *)(BE_biosDate + addr - 0xFFFF5);
 	} else if (addr == 0xFFFFE) {
 		/* Return system model identifier for non-x86 machines */
 		DB(printf("BE_memaddr - Returning model\n");)