Reapply "hoc-clk: add live vdd2, live boost clock and basic pwm dimming"

This reverts commit 21a3f953d7.

Source/Atmosphere-MTC-Unlock/libraries/config/board/generic/linux/board.mk

@@ -0,0 +1,19 @@
+export ATMOSPHERE_DEFINES  += -DATMOSPHERE_BOARD_GENERIC_LINUX
+export ATMOSPHERE_SETTINGS +=
+export ATMOSPHERE_CFLAGS   +=
+export ATMOSPHERE_CXXFLAGS +=
+export ATMOSPHERE_ASFLAGS  +=
+
+ifeq ($(strip $(ATMOSPHERE_COMPILER_NAME)),clang)
+export ATMOSPHERE_CXXFLAGS += -stdlib=libc++
+
+ifeq ($(strip $(ATMOSPHERE_ARCH_NAME)),x64)
+export ATMOSPHERE_SETTINGS += -target x86_64-pc-linux-gnu
+else ifeq ($(strip $(ATMOSPHERE_ARCH_NAME)),arm64)
+export ATMOSPHERE_SETTINGS += -target aarch64-linux-gnu
+endif
+
+endif
+
+# TODO: Better way of doing this?
+export ATMOSPHERE_CXXFLAGS += -I/opt/libjpeg-turbo/include