MIPS: loongson32: Remove dma.h and nand.h

Since commit 7b3415f ("MIPS: Loongson32: Remove
unused platform devices"), struct plat_ls1x_dma and plat_ls1x_nand
are unused. Then, dma.h and nand.h are useless.
Therefore, remove these useless header files.

Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

Author: kelvincheung

arch/mips/include/asm/mach-loongson32/dma.h

@@ -8,9 +8,6 @@
 
 #include <linux/platform_device.h>
 
-#include <dma.h>
-#include <nand.h>
-
 extern struct platform_device ls1x_uart_pdev;
 extern struct platform_device ls1x_eth0_pdev;
 extern struct platform_device ls1x_eth1_pdev;

arch/mips/include/asm/mach-loongson32/nand.h

@@ -15,8 +15,6 @@
 
 #include <platform.h>
 #include <loongson1.h>
-#include <dma.h>
-#include <nand.h>
 
 /* 8250/16550 compatible UART */
 #define LS1X_UART(_id)						\

arch/mips/include/asm/mach-loongson32/platform.h

@@ -8,8 +8,6 @@
 #include <linux/sizes.h>
 
 #include <loongson1.h>
-#include <dma.h>
-#include <nand.h>
 #include <platform.h>
 
 static const struct gpio_led ls1x_gpio_leds[] __initconst = {