AGESA: Disable boards from build

As per the 4.11 release requirement, C_ENVIRONMENT_BOOTBLOCK=y
is a mandatory feature, which most AGESA and binaryPI boards lack.
Disable such platforms from the build for the time being.

The Kconfig symbol has been flipped, ROMCC_BOOTBLOCK=n is the
same mandated feature as C_ENVIRONMENT_BOOTBLOCK=y.

If a platform does not reach ROMCC_BOOTBLOCK=n within a
reasonable timeframe both the mainboard and the respective
unused platform support code will get removed.

Change-Id: I7fceb0370f7f4f5f52080277c5d21615d3ab3454
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37355
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/mainboard/asus/am1i-a/Kconfig

@@ -1,9 +1,12 @@
+config BOARD_ASUS_AM1I_A
+	def_bool n
+
 if BOARD_ASUS_AM1I_A
 
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
 	select BOARD_ROMSIZE_KB_8192
-	select ROMCC_BOOTBLOCK
+	#select ROMCC_BOOTBLOCK
 	select CPU_AMD_AGESA_FAMILY16_KB
 	select FORCE_AM1_SOCKET_SUPPORT
 	select GFXUMA

src/mainboard/asus/am1i-a/Kconfig.name

@@ -1,2 +1,2 @@
-config BOARD_ASUS_AM1I_A
-	bool "AM1I-A"
+#config BOARD_ASUS_AM1I_A
+#	bool"AM1I-A"