build: enable gzipping of images on x86 even if ext4 is disabled

There is lots of padding between the boot partition and the rootfs, so
gzipping is helpful here

Signed-off-by: Felix Fietkau <nbd@nbd.name>

config/Config-images.in

@@ -242,7 +242,7 @@ menu "Target Images"
 
 	config TARGET_IMAGES_GZIP
 		bool "GZip images"
-		depends on TARGET_IMAGES_PAD || TARGET_ROOTFS_EXT4FS
+		depends on TARGET_IMAGES_PAD || TARGET_ROOTFS_EXT4FS || TARGET_x86
 		default y
 
 	comment "Image Options"

target/linux/x86/image/Makefile

@@ -153,11 +153,9 @@ ifneq ($(CONFIG_TARGET_IMAGES_GZIP),)
   define Image/Build/gzip/ext4
 	$(call Image/Build/gzip,ext4)
   endef
-  ifneq ($(CONFIG_TARGET_IMAGES_PAD),)
-    define Image/Build/gzip/squashfs
+  define Image/Build/gzip/squashfs
 	$(call Image/Build/gzip,squashfs)
-    endef
-  endif
+  endef
 endif
 
 define Image/BuildKernel