ARM: socfpga: do not add board directory to header search path

The compiler option "-Iboard/$(VENDOR)/$(BOARD)" just exists here
for iocsr_config.c to be able to include iocsr_config.h.

Use "..." instead of <...> to include a header in the same directory.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/cpu/armv7/socfpga/config.mk

@@ -6,6 +6,3 @@
 ifndef CONFIG_SPL_BUILD
 ALL-y	+= u-boot.img
 endif
-
-# Added for handoff support
-PLATFORM_RELFLAGS += -Iboard/$(VENDOR)/$(BOARD)

board/altera/socfpga/iocsr_config.c

@@ -6,7 +6,7 @@
 
 /* This file is generated by Preloader Generator */
 
-#include <iocsr_config.h>
+#include "iocsr_config.h"
 
 #ifdef CONFIG_TARGET_SOCFPGA_CYCLONE5
 const unsigned long iocsr_scan_chain0_table[((