kconfig: move BUILD_VM_ROM Kconfig.xtos-build

The BUILD_VM_ROM option only affects SOF XTOS builds, so move
the option to a separate file.

Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>

Author: kv2019i

Kconfig

@@ -157,12 +157,6 @@ config DEBUG_LOCKS_VERBOSE
 	  In addition to DEBUG_LOCKS it also adds spinlock traces
 	  every time the lock is acquired.
 
-config BUILD_VM_ROM
-	bool "Build VM ROM"
-	default n
-	help
-	  Select if you want to build VM ROM
-
 config DEBUG_IPC_COUNTERS
 	bool "IPC counters"
 	depends on CAVS

Kconfig.xtos-build

@@ -35,3 +35,9 @@ config OPTIMIZE_FOR_NONE
 	  It means -O0 for GCC or equivalent for other compilers.
 
 endchoice
+
+config BUILD_VM_ROM
+	bool "Build VM ROM"
+	default n
+	help
+	  Select if you want to build VM ROM