MIPS: Loongson32: Remove unused platform devices

platform.c contains several unused platform device with no
drivers submited.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: keguang.zhang@gmail.com

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

@@ -17,19 +17,15 @@
 
 extern struct platform_device ls1x_uart_pdev;
 extern struct platform_device ls1x_cpufreq_pdev;
-extern struct platform_device ls1x_dma_pdev;
 extern struct platform_device ls1x_eth0_pdev;
 extern struct platform_device ls1x_eth1_pdev;
 extern struct platform_device ls1x_ehci_pdev;
 extern struct platform_device ls1x_gpio0_pdev;
 extern struct platform_device ls1x_gpio1_pdev;
-extern struct platform_device ls1x_nand_pdev;
 extern struct platform_device ls1x_rtc_pdev;
 extern struct platform_device ls1x_wdt_pdev;
 
 void __init ls1x_clk_init(void);
-void __init ls1x_dma_set_platdata(struct plat_ls1x_dma *pdata);
-void __init ls1x_nand_set_platdata(struct plat_ls1x_nand *pdata);
 void __init ls1x_rtc_set_extclk(struct platform_device *pdev);
 void __init ls1x_serial_set_uartclk(struct platform_device *pdev);