Added removal for the most used wic types from custom images

Suggested-by: Dimitris Tassopoulos <dimtass@gmail.com>
https://github.com/STMicroelectronics/meta-st-stm32mp/pull/14

Change-Id: Ifa56129da5c76bd6181618f9f906169becff23bd

conf/machine/include/st-machine-common-stm32mp.inc

@@ -162,7 +162,8 @@ UBINIZE_ARGS_nand_4_256 = "--min-io-size 4096 --peb-size 256KiB"
 EXTRA_UBIFS_SIZE_nand_4_256 = "2304"
 
 # Default FSTYPES requested
-IMAGE_FSTYPES ?= "tar.xz ext4"
+WKS_IMAGE_FSTYPES ?= ""
+IMAGE_FSTYPES ?= "${WKS_IMAGE_FSTYPES} tar.xz ext4"
 
 # Define specific EXT4 command line:
 #   - Create minimal inode number (as it is done by default in image_types.bbclass)

conf/machine/stm32mp1-disco.conf

@@ -96,5 +96,5 @@ TRUSTED_WIC_FILE = "${@bb.utils.contains('ST_VENDORFS','1','sdcard-stm32mp157c-d
 OPTEE_WIC_FILE = "${@bb.utils.contains('ST_VENDORFS','1','sdcard-stm32mp157c-dk2-optee-vendorfs-1GB.wks.in','sdcard-stm32mp157c-dk2-optee-1GB.wks.in',d)}"
 
 # for generated a WIC file, please uncomment the 2 following lines or add them to local.conf
-#IMAGE_FSTYPES += "wic ext4"
+#WKS_IMAGE_FSTYPES += "wic wic.bz2 wic.bmap"
 #WKS_FILE += "${@bb.utils.contains('BOOTSCHEME_LABELS', 'optee', '${OPTEE_WIC_FILE}', '${TRUSTED_WIC_FILE}', d)}"