roms: build coreboot *after* checking variables

otherwise, release=n is ignored and an image is built in
the elf/ directory, even if it's still skipped for bin/

avoid doing unnecessary work per-release by checking the
variables before building coreboot via script/trees

Signed-off-by: Leah Rowe <leah@libreboot.org>

script/roms

@@ -93,12 +93,13 @@ configure_target()
 
 	# Override the above defaults using target.cfg
 	eval `setcfg "$targetdir/target.cfg"`
-	x_ ./update trees -b coreboot $board
 
 	[ -z "$tree" ] && $err "$board: tree not defined"
 	[ "$XBMK_RELEASE" = "y" ] && [ "$release" = "n" ] && return 1
 	[ "$board" = "$tree" ] && return 1
 
+	x_ ./update trees -b coreboot $board
+
 	cbdir="src/coreboot/$tree"
 	cbfstool="elf/cbfstool/$tree/cbfstool"
 	[ -f "$cbfstool" ] || x_ ./update trees -b coreboot utils $tree