board_enable.c: Remove unnecessary assignment

In function board_asus_p3b_f there were two consecutive lines which
modified the value of variable b

        // Do something with b

        b=INB(0x80);
        b=INB(smbba);

        //Do something with b

Since the value of b is not used after first assignment, remove the
first assignment.

Change-Id: I7458b416a69fd5e2aa300ca49d1352b6074ad0bc
Original-Tested-by: Keith Hui <buurin@gmail.com>
Signed-off-by: Aarya Chaumal <aarya.chaumal@gmail.com>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/62761
Original-Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Original-Reviewed-by: Keith Hui <buurin@gmail.com>
Original-Reviewed-by: Felix Singer <felixsinger@posteo.net>
Original-Reviewed-by: Nico Huber <nico.h@gmx.de>
Original-Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/71450
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/board_enable.c b/board_enable.c
index 101e1c8..74410bb 100644
--- a/board_enable.c
+++ b/board_enable.c
@@ -906,7 +906,7 @@
 	/* Wait until SMBus transaction is complete. */
 	b = 0x1;
 	while (b & 0x01) {
-		b = INB(0x80);
+		INB(0x80);
 		b = INB(smbba);
 	}