Apply optimize harder O3 patch, thanks to @NeroReflex (linux-chimeraos).

packages/kernel/linux/patches/AMD64/010-optimize-harder-O3.patch

@@ -0,0 +1,46 @@
+diff --git a/Makefile b/Makefile
+--- a/Makefile
++++ b/Makefile
+@@ -442,7 +442,7 @@ endif
+ HOSTPKG_CONFIG	= pkg-config
+
+ KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
+-			 -O2 -fomit-frame-pointer -std=gnu11
++			 -O3 -fomit-frame-pointer -std=gnu11
+ KBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS)
+ KBUILD_USERLDFLAGS := $(USERLDFLAGS)
+
+@@ -474,7 +474,7 @@ endif
+ 			    -Wclippy::dbg_macro
+
+ KBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
+-KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
++KBUILD_HOSTCXXFLAGS := -Wall -O3 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
+ KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \
+ 			-Zallow-features= $(HOSTRUSTFLAGS)
+ KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
+@@ -757,7 +757,7 @@ KBUILD_CFLAGS       += $(call cc-disable-warning, format-overflow)
+ KBUILD_CFLAGS  += $(call cc-disable-warning, address-of-packed-member)
+
+ ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
+-KBUILD_CFLAGS += -O2
++KBUILD_CFLAGS += -O3
+ KBUILD_RUSTFLAGS += -Copt-level=2
+ else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
+ KBUILD_CFLAGS += -Os
+diff --git a/init/Kconfig b/init/Kconfig
+--- a/init/Kconfig
++++ b/init/Kconfig
+@@ -1401,10 +1401,10 @@ choice
+ 	default CC_OPTIMIZE_FOR_PERFORMANCE
+
+ config CC_OPTIMIZE_FOR_PERFORMANCE
+-	bool "Optimize for performance (-O2)"
++	bool "Optimize for performance (-O3)"
+ 	help
+ 	  This is the default optimization level for the kernel, building
+-	  with the "-O2" compiler flag for best performance and most
++	  with the "-O3" compiler flag for best performance and most
+ 	  helpful compile-time warnings.
+
+ config CC_OPTIMIZE_FOR_SIZE