arm64: remove some unused platform code

This brings the kernel down to 24M.

Signed-off-by: Lorenz Bauer <[email protected]>

config-arm64

@@ -4,3 +4,42 @@ CONFIG_PCI_HOST_GENERIC=y
 CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
 CONFIG_SERIAL_AMBA_PL011=y
 CONFIG_SERIAL_EARLYCON=y
+
+# Remove unused platform code.
+CONFIG_ARCH_ACTIONS=n
+CONFIG_ARCH_ALPINE=n
+CONFIG_ARCH_APPLE=n
+CONFIG_ARCH_BCM=n
+CONFIG_ARCH_BERLIN=n
+CONFIG_ARCH_BITMAIN=n
+CONFIG_ARCH_EXYNOS=n
+CONFIG_ARCH_HISI=n
+CONFIG_ARCH_INTEL_SOCFPGA=n
+CONFIG_ARCH_K3=n
+CONFIG_ARCH_KEEMBAY=n
+CONFIG_ARCH_NXP=n
+CONFIG_ARCH_LG1K=n
+CONFIG_ARCH_MA35=n
+CONFIG_ARCH_MEDIATEK=n
+CONFIG_ARCH_MESON=n
+CONFIG_ARCH_MVEBU=n
+CONFIG_ARCH_NPCM=n
+CONFIG_ARCH_PENSANDO=n
+CONFIG_ARCH_QCOM=n
+CONFIG_ARCH_REALTEK=n
+CONFIG_ARCH_RENESAS=n
+CONFIG_ARCH_ROCKCHIP=n
+CONFIG_ARCH_SEATTLE=n
+CONFIG_ARCH_SPARX5=n
+CONFIG_ARCH_SPRD=n
+CONFIG_ARCH_STM32=n
+CONFIG_ARCH_SUNXI=n
+CONFIG_ARCH_SYNQUACER=n
+CONFIG_ARCH_TEGRA=n
+CONFIG_ARCH_THUNDER=n
+CONFIG_ARCH_THUNDER2=n
+CONFIG_ARCH_UNIPHIER=n
+CONFIG_ARCH_VEXPRESS=n
+CONFIG_ARCH_VISCONTI=n
+CONFIG_ARCH_XGENE=n
+CONFIG_ARCH_ZYNQMP=n