chipset_enable.c: Spell `BIOS` in uppercase

Intel document #336067 uses `BIOS Control` to refer to this register.

Change-Id: Ib66547b2b5d77658ab1925e4ad3acfe44e14843c
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/40857
Original-Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Original-Reviewed-by:  Marcello Sylvester Bauer <sylv@sylv.io>
Original-Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/71309
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/chipset_enable.c b/chipset_enable.c
index 921c96b..1feb260 100644
--- a/chipset_enable.c
+++ b/chipset_enable.c
@@ -354,7 +354,7 @@
 		msg_pwarn("Warning: BIOS region SMM protection is enabled!\n");
 
 	if (new != wanted)
-		msg_pwarn("Warning: Setting Bios Control at 0x%x from 0x%02x to 0x%02x failed.\n"
+		msg_pwarn("Warning: Setting BIOS Control at 0x%x from 0x%02x to 0x%02x failed.\n"
 			  "New value is 0x%02x.\n", bios_cntl, old, wanted, new);
 
 	/* Return an error if we could not set the write enable only. */