Makefile: use two double-quotations as a pair

Some editors such as Emacs can highlight source files.
But their parser algorithm is not perfect.

If you use one double-quotation alone, some editor cannot
handle it nicely and mark source lines as a string by mistake.

It is preferable to use two double-quotations as a pair.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

Makefile

@@ -187,7 +187,7 @@ ifndef LDSCRIPT
 	#LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
 	ifdef CONFIG_SYS_LDSCRIPT
 		# need to strip off double quotes
-		LDSCRIPT := $(subst ",,$(CONFIG_SYS_LDSCRIPT))
+		LDSCRIPT := $(CONFIG_SYS_LDSCRIPT:"%"=%)
 	endif
 endif
 
@@ -345,7 +345,7 @@ ALL-$(CONFIG_SPL_FRAMEWORK) += $(obj)u-boot.img
 ALL-$(CONFIG_TPL) += $(obj)tpl/u-boot-tpl.bin
 ALL-$(CONFIG_OF_SEPARATE) += $(obj)u-boot.dtb $(obj)u-boot-dtb.bin
 ifneq ($(CONFIG_SPL_TARGET),)
-ALL-$(CONFIG_SPL) += $(obj)$(subst ",,$(CONFIG_SPL_TARGET))
+ALL-$(CONFIG_SPL) += $(obj)$(CONFIG_SPL_TARGET:"%"=%)
 endif
 
 # enable combined SPL/u-boot/dtb rules for tegra

arch/blackfin/config.mk

@@ -14,9 +14,9 @@ CONFIG_BFIN_CPU := \
 	$(shell awk '$$2 == "CONFIG_BFIN_CPU" { print $$3 }' \
 		$(src)include/configs/$(BOARD).h)
 else
-CONFIG_BFIN_CPU := $(strip $(subst ",,$(CONFIG_BFIN_CPU)))
+CONFIG_BFIN_CPU := $(strip $(CONFIG_BFIN_CPU:"%"=%))
 endif
-CONFIG_BFIN_BOOT_MODE := $(strip $(subst ",,$(CONFIG_BFIN_BOOT_MODE)))
+CONFIG_BFIN_BOOT_MODE := $(strip $(CONFIG_BFIN_BOOT_MODE:"%"=%))
 
 PLATFORM_RELFLAGS += -ffixed-P3 -fomit-frame-pointer -mno-fdpic
 PLATFORM_CPPFLAGS += -DCONFIG_BLACKFIN

dts/Makefile

@@ -10,7 +10,7 @@
 ifeq ($(DEVICE_TREE),)
 $(if $(CONFIG_DEFAULT_DEVICE_TREE),,\
 $(error Please define CONFIG_DEFAULT_DEVICE_TREE in your board header file))
-DEVICE_TREE = $(subst ",,$(CONFIG_DEFAULT_DEVICE_TREE))
+DEVICE_TREE = $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%)
 endif
 
 DTS_INCDIRS =  $(SRCTREE)/board/$(VENDOR)/$(BOARD)/dts

spl/Makefile

@@ -37,7 +37,7 @@ endif
 HAVE_VENDOR_COMMON_LIB = $(if $(wildcard $(SRCTREE)/board/$(VENDOR)/common/Makefile),y,n)
 
 ifdef	CONFIG_SPL_START_S_PATH
-START_PATH := $(subst ",,$(CONFIG_SPL_START_S_PATH))
+START_PATH := $(CONFIG_SPL_START_S_PATH:"%"=%)
 else
 START_PATH := $(CPUDIR)
 endif
@@ -118,7 +118,7 @@ __LIBS := $(subst $(obj),,$(LIBS))
 # Linker Script
 ifdef CONFIG_SPL_LDSCRIPT
 # need to strip off double quotes
-LDSCRIPT := $(addprefix $(SRCTREE)/,$(subst ",,$(CONFIG_SPL_LDSCRIPT)))
+LDSCRIPT := $(addprefix $(SRCTREE)/,$(CONFIG_SPL_LDSCRIPT:"%"=%))
 endif
 
 ifeq ($(wildcard $(LDSCRIPT)),)