binman: Allow selection of logging verbosity

Support a new BINMAN_VERBOSE option to the build, to allow passing the
-v flag to binman.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>

Makefile

@@ -1214,7 +1214,8 @@ u-boot.ldr:	u-boot
 quiet_cmd_binman = BINMAN  $@
 cmd_binman = $(srctree)/tools/binman/binman $(if $(BINMAN_DEBUG),-D) \
                 --toolpath $(objtree)/tools \
-                build -u -d u-boot.dtb -O . -m \
+		$(if $(BINMAN_VERBOSE),-v$(BINMAN_VERBOSE)) \
+		build -u -d u-boot.dtb -O . -m \
 		-I . -I $(srctree) -I $(srctree)/board/$(BOARDDIR) \
 		$(BINMAN_$(@F))
 

tools/binman/README

@@ -934,6 +934,12 @@ BINMAN_DEBUG=1 to your build:
    make sandbox_defconfig
    make BINMAN_DEBUG=1
 
+To enable verbose logging from binman, base BINMAN_VERBOSE to your build, which
+adds a -v<level> option to the call to binman:
+
+   make sandbox_defconfig
+   make BINMAN_VERBOSE=5
+
 
 History / Credits
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