mb/intel/adlrvp: Refactor ADLRVP code to get rid of 'variants/baseboard'

List of changes:
1. Use devicetree.cb from default location
2. Create variant directory for ADL RVP with external EC as
'adlrvp_p_ext_ec'
3. Add initial overridetree.cb for 'adlrvp_p' and 'adlrvp_p_ext_ec'
to override 'devicetree.cb' as applicable.
4. Move all common files between 'adlrvp_p' and 'adlrvp_p_ext_ec'
to mainboard directory

TEST=Build and boot both ADLRVP with onboard and external EC.

Change-Id: I3591e214ed32dc9baaa49b92dff59579f29c7bd6
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47335
Reviewed-by: V Sowmya <v.sowmya@intel.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/src/mainboard/intel/adlrvp/early_gpio.c b/src/mainboard/intel/adlrvp/early_gpio.c
new file mode 100644
index 0000000000..d45bf8e067
--- /dev/null
+++ b/src/mainboard/intel/adlrvp/early_gpio.c
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <baseboard/gpio.h>
+#include <baseboard/variants.h>
+#include <commonlib/helpers.h>
+#include <soc/gpio.h>
+
+/* Early pad configuration in bootblock */
+static const struct pad_config early_gpio_table[] = {
+	/* WWAN_RST# */
+	PAD_CFG_GPO(GPP_E10, 0, PLTRST),
+	/* WWAN_PWR_EN */
+	PAD_CFG_GPO(GPP_E13, 1, DEEP),
+};
+
+void variant_configure_early_gpio_pads(void)
+{
+	gpio_configure_pads(early_gpio_table, ARRAY_SIZE(early_gpio_table));
+}