mb/purism/librem_whl: rename to librem_cnl

Since Whiskeylake SoC code is actually a subset of soc/intel/cannonlake,
rename the baseboard so that boards using other 'cannonlake family' SoCs
(e.g., Cometlake) can be added with minimal confusion.

Rename the mainboard dir and baseboard name, and adjust any references
to them.

Change-Id: I2af7977f1622070eb8bf8449bc8306f9d75b9851
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47050
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/purism/librem_cnl/Kconfig

@@ -1,4 +1,4 @@
-config BOARD_PURISM_BASEBOARD_LIBREM_WHL
+config BOARD_PURISM_BASEBOARD_LIBREM_CNL
 	def_bool n
 	select BOARD_ROMSIZE_KB_16384
 	select DRIVERS_GENERIC_CBFS_SERIAL
@@ -13,11 +13,11 @@ config BOARD_PURISM_BASEBOARD_LIBREM_WHL
 	select SPD_READ_BY_WORD
 	select USE_LEGACY_8254_TIMER
 
-if BOARD_PURISM_BASEBOARD_LIBREM_WHL
+if BOARD_PURISM_BASEBOARD_LIBREM_CNL
 
 config MAINBOARD_DIR
 	string
-	default "purism/librem_whl"
+	default "purism/librem_cnl"
 
 config MAINBOARD_FAMILY
 	string

src/mainboard/purism/librem_cnl/Kconfig.name

@@ -1,3 +1,3 @@
 config BOARD_PURISM_LIBREM_MINI
 	bool "Librem Mini"
-	select BOARD_PURISM_BASEBOARD_LIBREM_WHL
+	select BOARD_PURISM_BASEBOARD_LIBREM_CNL

src/mainboard/purism/librem_cnl/board_info.txt

@@ -1,5 +1,5 @@
 Vendor name: Purism
-Board name: librem_whl
+Board name: librem_cnl
 Category: desktop
 Release year: 2020
 ROM package: SOIC-8