soc/intel/cmn/basecode/debug: Add SOC_INTEL_COMMON_DEBUG_CONSENT config

This patch adds a generic config option, SOC_INTEL_COMMON_DEBUG_CONSENT,
to control the debug interface on Intel SoCs. This eliminates the need
for SoC-specific config options like SOC_INTEL_<SOC_NAME>_DEBUG_CONSENT.

Default values are provided for various debug types:
- 0: Disabled
- 1: Enabled (DCI OOB + [DbC])
- 2: Enabled (DCI OOB)
- 3: Enabled (USB3 DbC)
- 4: Enabled (XDP/MIPI60)
- 5: Enabled (USB2 DbC)
- 6: Enabled (2-wire DCI OOB)
- 7: Manual

Specific SoCs can override the SOC_INTEL_COMMON_DEBUG_CONSENT value
using SoC config override methods.

TEST=Able to build google/rex.

Change-Id: I84ad03f0ffe5da4bc53c665489c430fe9b65ede7
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83956
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>

src/soc/intel/common/basecode/debug/Kconfig

@@ -6,3 +6,19 @@ config SOC_INTEL_COMMON_BASECODE_DEBUG_FEATURE
 	help
 	  Driver to control runtime features of Intel SoC & coreboot. For example, controlling
 	  the CSE firmware update feature without rebuilding the code.
+
+config SOC_INTEL_COMMON_DEBUG_CONSENT
+	int "Debug Consent for Intel SoC"
+	# USB DBC is more common for developers so make this default to 3 if
+	# SOC_INTEL_DEBUG_CONSENT=y
+	default 3 if SOC_INTEL_DEBUG_CONSENT
+	default 0
+	help
+	  This is to control debug interface on SOC.
+	  Setting non-zero value will allow to use DBC or DCI to debug SOC.
+	  PlatformDebugConsent in FspmUpd.h has the details.
+
+	  Desired platform debug type are
+	  0:Disabled, 1:Enabled (DCI OOB+[DbC]), 2:Enabled (DCI OOB),
+	  3:Enabled (USB3 DbC), 4:Enabled (XDP/MIPI60), 5:Enabled (USB2 DbC),
+	  6:Enable (2-wire DCI OOB), 7:Manual.