Kill unneeded #include <linux/kconfig.h>

Because the top-level Makefile forces all the source files
to include include/linux/kconfig.h (see the UBOOTINCLUDE define),
these includes are redundant.

By the way, there are exceptions for the statement above; host
programs.  In fact, host tools in U-Boot depend on a particular
board configuration, although I think they should not.  So, some
files still include <linux/config.h> to work around build errors
on host tools.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Acked-by: Simon Glass <sjg@chromium.org>

arch/arm/cpu/armv7/sunxi/dram_sun8i_a23.c

@@ -26,7 +26,6 @@
 #include <asm/arch/clock.h>
 #include <asm/arch/dram.h>
 #include <asm/arch/prcm.h>
-#include <linux/kconfig.h>
 
 static const struct dram_para dram_para = {
 	.clock = CONFIG_DRAM_CLK,

arch/arm/cpu/armv7/sunxi/dram_sun8i_a33.c

@@ -14,7 +14,6 @@
 #include <asm/arch/clock.h>
 #include <asm/arch/dram.h>
 #include <asm/arch/prcm.h>
-#include <linux/kconfig.h>
 
 /* PLL runs at 2x dram-clk, controller runs at PLL / 4 (dram-clk / 2) */
 #define DRAM_CLK_MUL 2

arch/x86/cpu/ivybridge/gma.c

@@ -16,7 +16,6 @@
 #include <asm/pci.h>
 #include <asm/arch/pch.h>
 #include <asm/arch/sandybridge.h>
-#include <linux/kconfig.h>
 
 struct gt_powermeter {
 	u16 reg;

board/sunxi/dram_sun4i_auto.c

@@ -1,6 +1,5 @@
 #include <common.h>
 #include <asm/arch/dram.h>
-#include <linux/kconfig.h>
 
 static struct dram_para dram_para = {
 	.clock = CONFIG_DRAM_CLK,

board/sunxi/dram_sun5i_auto.c

@@ -2,7 +2,6 @@
 
 #include <common.h>
 #include <asm/arch/dram.h>
-#include <linux/kconfig.h>
 
 static struct dram_para dram_para = {
 	.clock = CONFIG_DRAM_CLK,