Revert "Update bionic kernel headers using update_all.py"

This reverts commit 94a85f663694e1869acb1c2e8a3c374a6fa3ab86

There is a smoke test failure for Prime but Crespo/Stingray are fine. Will revert the change for now until further investigation is made.
diff --git a/libc/kernel/arch-arm/asm/arch/mtd-xip.h b/libc/kernel/arch-arm/asm/arch/mtd-xip.h
index 2d05691..9b60aef 100644
--- a/libc/kernel/arch-arm/asm/arch/mtd-xip.h
+++ b/libc/kernel/arch-arm/asm/arch/mtd-xip.h
@@ -7,32 +7,25 @@
  ***   structures, and macros generated from the original header, and thus,
  ***   contains no copyrightable information.
  ***
- ***   To edit the content of this header, modify the corresponding
- ***   source file (e.g. under external/kernel-headers/original/) then
- ***   run bionic/libc/kernel/tools/update_all.py
- ***
- ***   Any manual change here will be lost the next time this script will
- ***   be run. You've been warned!
- ***
  ****************************************************************************
  ****************************************************************************/
 #ifndef __ARCH_OMAP_MTD_XIP_H__
 #define __ARCH_OMAP_MTD_XIP_H__
+
 #include <asm/hardware.h>
 #define OMAP_MPU_TIMER_BASE (0xfffec500)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define OMAP_MPU_TIMER_OFFSET 0x100
+
 typedef struct {
  u32 cntl;
  u32 load_tim;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  u32 read_tim;
 } xip_omap_mpu_timer_regs_t;
+
 #define xip_omap_mpu_timer_base(n)  ((volatile xip_omap_mpu_timer_regs_t*)IO_ADDRESS(OMAP_MPU_TIMER_BASE +   (n)*OMAP_MPU_TIMER_OFFSET))
+
 #define xip_irqpending()   (omap_readl(OMAP_IH1_ITR) & ~omap_readl(OMAP_IH1_MIR))
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define xip_currtime() (~xip_omap_mpu_timer_read(0))
 #define xip_elapsed_since(x) (signed)((~xip_omap_mpu_timer_read(0) - (x)) / 6)
 #define xip_cpu_idle() asm volatile ("mcr p15, 0, %0, c7, c0, 4" :: "r" (1))
 #endif
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */