Makefiles: Hide skipping submodule info unless V=1

Currently, git prints out the submodules that are being skipped twice
on many builds.  This patch hides that output unless the build is set
to show it with `make V=1`.  This is the normal way of showing the extra
information during the build.

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: I7b5c7f1f79dcc88793a9a21f2e92e7accc5de1e0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59511
Reviewed-by: Patrick Georgi <patrick@coreboot.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/Makefile.inc b/Makefile.inc
index f14bc1e..1b1e973 100644
--- a/Makefile.inc
+++ b/Makefile.inc
@@ -189,29 +189,29 @@
 ifeq ($(CONFIG_COVERAGE),y)
 ramstage-c-ccopts += -fprofile-arcs -ftest-coverage
 endif
-
 ifneq ($(UPDATED_SUBMODULES),1)
 # try to fetch non-optional submodules if the source is under git
-forgetthis:=$(if $(GIT),$(shell git submodule update --init))
+forgetthis:=$(if $(GIT),$(shell git submodule update --init $(quiet_errors)))
 # Checkout Cmocka repository
-forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/cmocka))
+forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/cmocka $(quiet_errors)))
 ifeq ($(CONFIG_USE_BLOBS),y)
 # These items are necessary because each has update=none in .gitmodules.  They are ignored
 # until expressly requested and enabled with --checkout
-forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/blobs))
-forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/intel-microcode))
+forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/blobs $(quiet_errors)))
+forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/intel-microcode $(quiet_errors)))
 ifeq ($(CONFIG_FSP_USE_REPO),y)
-forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/fsp))
+forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/fsp $(quiet_errors)))
 endif
 ifeq ($(CONFIG_USE_AMD_BLOBS),y)
-forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/amd_blobs))
+forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/amd_blobs $(quiet_errors)))
 endif
 ifeq ($(CONFIG_USE_QC_BLOBS),y)
-forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/qc_blobs))
+forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/qc_blobs $(quiet_errors)))
 endif
 endif
 UPDATED_SUBMODULES:=1
 COREBOOT_EXPORTS += UPDATED_SUBMODULES
+
 endif
 
 postcar-c-deps:=$$(OPTION_TABLE_H)