MIPS: ath79: Disable platform code for OF boards.

For OF boards we have to skip platform initialization code
so we can prove that OF code do all necessary initialization.

[[e-mail]: Fix merge conflict.]

Signed-off-by: Antony Pavlov <[e-mail]>
Signed-off-by: Sudip Mukherjee <[e-mail]>
Reviewed-by: Marek Vasut <[e-mail]>
Cc: Alban Bedel <[e-mail]>
Cc: [e-mail]
Patchwork: https://patchwork.linux-mips.org/patch/12877/
Patchwork: https://patchwork.linux-mips.org/patch/12920/
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/ath79/setup.c

···
 	else if (fw_arg0 == -2)
 		__dt_setup_arch((void *)KSEG0ADDR(fw_arg1));
 
-	ath79_reset_base = ioremap_nocache(AR71XX_RESET_BASE,
-					   AR71XX_RESET_SIZE);
-	ath79_pll_base = ioremap_nocache(AR71XX_PLL_BASE,
-					 AR71XX_PLL_SIZE);
-	ath79_detect_sys_type();
-	ath79_ddr_ctrl_init();
-
 	if (mips_machtype != ATH79_MACH_GENERIC_OF) {
+		ath79_reset_base = ioremap_nocache(AR71XX_RESET_BASE,
+						   AR71XX_RESET_SIZE);
+		ath79_pll_base = ioremap_nocache(AR71XX_PLL_BASE,
+						 AR71XX_PLL_SIZE);
+		ath79_detect_sys_type();
+		ath79_ddr_ctrl_init();
+
 		detect_memory_region(0, ATH79_MEM_SIZE_MIN, ATH79_MEM_SIZE_MAX);
+
 		/* OF machines should use the reset driver */
 		_machine_restart = ath79_restart;
 	}
+
 	_machine_halt = ath79_halt;
 	pm_power_off = ath79_halt;
 }