Drop HAVE_MAINBOARD_RESOURCES

These existed to provide a hook to add reserved memory regions
in the coreboot memory table. Reserved memory are now
added as resources.

Change-Id: I9f83df33845cfa6973b018a51cf9444dbf0f8667
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/1414
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Peter Stuge <peter@stuge.se>

src/mainboard/intel/emeraldlake2/Kconfig

@@ -12,7 +12,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select HAVE_ACPI_TABLES
 	select HAVE_OPTION_TABLE
 	select HAVE_ACPI_RESUME
-	select HAVE_MAINBOARD_RESOURCES
 	select MMCONF_SUPPORT
 	select HAVE_SMI_HANDLER
 	select GFXUMA