ARM: socfpga: Remove adhoc ethernet reset and configuration

Remove ad-hoc ethernet syscon registers configuration and reset support.
Reset is now handled by the reset framework and the syscon registers are
set in the dwmac_socfpga.c driver.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <chin.liang.see@intel.com>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 63ec024..9f5eaf8 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -772,7 +772,7 @@
 config ARCH_SOCFPGA
 	bool "Altera SOCFPGA family"
 	select ARCH_EARLY_INIT_R
-	select ARCH_MISC_INIT
+	select ARCH_MISC_INIT if !TARGET_SOCFPGA_ARRIA10
 	select ARM64 if TARGET_SOCFPGA_STRATIX10
 	select CPU_V7A if TARGET_SOCFPGA_GEN5 || TARGET_SOCFPGA_ARRIA10
 	select DM