[PATCH 1/3] bsh: update readme with instructions to build M2B

[Andrea Calabrese]

readme was missing instructions to build M2B. Now added.

Signed-off-by: Andrea Calabrese <andrea.calabrese at amarulasolutions.com>

diff --git a/board/bsh/imx6ulz_smm_m2/README b/board/bsh/imx6ulz_smm_m2/README
index 03d01325a97..3007180cc47 100644
--- a/board/bsh/imx6ulz_smm_m2/README
+++ b/board/bsh/imx6ulz_smm_m2/README
@@ -1,4 +1,4 @@
-How to Update U-Boot on imx6ulz_smm_m2 board
+How to Update U-Boot on imx6ulz_smm_m2 and imx6ulz_smm_m2b boards
 --------------------------------------------
 
 Required software on the host PC:
@@ -11,6 +11,11 @@ $ make mrproper
 $ make imx6ulz_smm_m2_defconfig
 $ make
 
+Build U-Boot for m2b:
+$ make mrproper
+$ make imx6ulz_smm_m2b_defconfig
+$ make
+
 This generates the SPL and u-boot-dtb.img binaries.
 
 1. Loading U-Boot via USB Serial Download Protocol
-- 
2.48.1