mb/lenovo: Rename t440p to haswell

In preparation to follow-up commits, rename the mainboard folder from
t440p to haswell, which will have more variants later.

Change-Id: I4a9d68d54d5f0821bbf85faaa620855d456c97f3
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63511
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Peter Lemenkov <lemenkov@gmail.com>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>

src/mainboard/lenovo/haswell/cmos.default

@@ -0,0 +1,14 @@
+boot_option=Fallback
+debug_level=Debug
+power_on_after_fail=Disable
+nmi=Enable
+volume=0x3
+first_battery=Primary
+wlan=Enable
+fn_ctrl_swap=Disable
+f1_to_f12_as_primary=Enable
+sticky_fn=Disable
+trackpoint=Enable
+backlight=Keyboard
+enable_dual_graphics=Disable
+usb_always_on=Disable