mb/amd/bettong: Fix typo

Use 'irremovable' over 'unremovable'

Change-Id: Id305dbe56a93740abc49d85d11402d1b63989dad
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37527
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/amd/bettong/BiosCallOuts.c b/src/mainboard/amd/bettong/BiosCallOuts.c
index a6f424e..22a8403 100644
--- a/src/mainboard/amd/bettong/BiosCallOuts.c
+++ b/src/mainboard/amd/bettong/BiosCallOuts.c
@@ -100,7 +100,7 @@
 			FchParams_env->Usb.Xhci0Enable = FALSE;
 
 		FchParams_env->Usb.Xhci1Enable = FALSE;
-		FchParams_env->Usb.USB30PortInit = 8; /* 8: If USB3 port is unremoveable. */
+		FchParams_env->Usb.USB30PortInit = 8; /* 8: If USB3 port is irremovable. */
 
 		/* sata configuration */
 		/* SD configuration */
diff --git a/src/mainboard/amd/bettong/README b/src/mainboard/amd/bettong/README
index d834af4..631cf0f 100644
--- a/src/mainboard/amd/bettong/README
+++ b/src/mainboard/amd/bettong/README
@@ -21,5 +21,5 @@
 10. Fix the PCIe lane map.
 11. Lower the TOM to give more MMIO space.
 12. Add USB device.
-13. Set the USB3 port as unremoveable.
+13. Set the USB3 port as irremovable.
 14. Update AGESA to CarrizoPI 1.1.0.1.