Kconfig: Update ASan config options

Instead of enabling ASAN_IN_ROMSTAGE from Kconfig file in a
platform's dedicated directory, let's introduce a new config
option HAVE_ASAN_IN_ROMSTAGE to denote if a given platform
supports ASan in romstage.

Similary, use HAVE_ASAN_IN_RAMSTAGE to indicate
if a given platform supports ASan in ramstage. Consequently, we
no longer have to make ASan x86 specific.

Change-Id: I36b144305465052718f245cacf61d3ca44dfb4b4
Signed-off-by: Harshit Sharma <harshitsharmajs@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44258
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>

src/Kconfig

@@ -270,10 +270,31 @@ config UBSAN
 	  say N because it adds a small performance penalty and may abort
 	  on code that happens to work in spite of the UB.
 
-config ASAN_IN_RAMSTAGE
+config HAVE_ASAN_IN_ROMSTAGE
-	bool "Address sanitizer support"
+	bool
-	depends on ARCH_X86
 	default n
+
+config ASAN_IN_ROMSTAGE
+	bool
+	default n
+	help
+	  Enable address sanitizer in romstage for platform.
+
+config HAVE_ASAN_IN_RAMSTAGE
+	bool
+	default n
+
+config ASAN_IN_RAMSTAGE
+	bool
+	default n
+	help
+	  Enable address sanitizer in ramstage for platform.
+
+config ASAN
+	bool "Address sanitizer support"
+	default n
+	select ASAN_IN_ROMSTAGE if HAVE_ASAN_IN_ROMSTAGE
+	select ASAN_IN_RAMSTAGE if HAVE_ASAN_IN_RAMSTAGE
 	help
 	  Enable address sanitizer - runtime memory debugger,
 	  designed to find out-of-bounds accesses and use-after-scope bugs.
@@ -283,18 +304,11 @@ config ASAN_IN_RAMSTAGE
 
 	  If unsure, say N.
 
-if ASAN_IN_RAMSTAGE
+if ASAN
 	comment "Before using this feature, make sure that           "
 	comment "asan_shadow_offset_callback patch is applied to GCC."
 endif
 
-config ASAN_IN_ROMSTAGE
-	bool
-	depends on ASAN_IN_RAMSTAGE
-	default n
-	help
-	  Enable address sanitizer in romstage for platform.
-
 choice
 	prompt "Stage Cache for ACPI S3 resume"
 	default NO_STAGE_CACHE if !HAVE_ACPI_RESUME