lynxpoint/broadwell: Rename LP GPIO config global

Do not use the same name as the non-LP GPIO config. This allows checking
at build-time that a mainboard uses the correct GPIO config format.

Without this commit, there are no build-time errors when using the wrong
format of GPIO config, but there would be undefined behavior at runtime.

Tested by trying to build asrock/b85m_pro4 and hp/folio_9480m after
toggling the `INTEL_LYNXPOINT_LP` Kconfig option (and trimming down the
USB config arrays for asrock/b85m_pro4). In both cases, building failed
because the necessary GPIO config global is not defined, as expected.

Change-Id: Ib06507ef8179da22bdb27593daf972e788051f3a
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51661
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/southbridge/intel/lynxpoint/early_pch.c

@@ -90,7 +90,7 @@ void early_pch_init(void)
 	pch_enable_bars();
 
 #if CONFIG(INTEL_LYNXPOINT_LP)
-	setup_pch_lp_gpios(mainboard_gpio_map);
+	setup_pch_lp_gpios(mainboard_lp_gpio_map);
 #else
 	setup_pch_gpios(&mainboard_gpio_map);
 #endif

src/southbridge/intel/lynxpoint/lp_gpio.h

@@ -172,6 +172,6 @@ int gpio_is_native(int gpio_num);
  */
 unsigned int get_gpios(const int *gpio_num_array);
 
-extern const struct pch_lp_gpio_map mainboard_gpio_map[];
+extern const struct pch_lp_gpio_map mainboard_lp_gpio_map[];
 
 #endif