hw-breakpoint: Move asm-generic/hw_breakpoint.h to linux/hw_breakpoint.h

We plan to make the breakpoints parameters generic among architectures.
For that it's better to move the asm-generic header to a generic linux
header.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

arch/x86/include/asm/hw_breakpoint.h

@@ -12,7 +12,7 @@ struct arch_hw_breakpoint {
 };
 
 #include <linux/kdebug.h>
-#include <asm-generic/hw_breakpoint.h>
+#include <linux/hw_breakpoint.h>
 
 /* Available HW breakpoint length encodings */
 #define HW_BREAKPOINT_LEN_1		0x40

include/asm-generic/hw_breakpoint.h → include/linux/hw_breakpoint.h

-#ifndef	_ASM_GENERIC_HW_BREAKPOINT_H
-#define	_ASM_GENERIC_HW_BREAKPOINT_H
+#ifndef _LINUX_HW_BREAKPOINT_H
+#define _LINUX_HW_BREAKPOINT_H
 
-#ifndef __ARCH_HW_BREAKPOINT_H
-#error "Please don't include this file directly"
-#endif
 
 #ifdef	__KERNEL__
 #include <linux/list.h>
@@ -136,4 +133,4 @@ extern void unregister_kernel_hw_breakpoint(struct hw_breakpoint *bp);
 extern unsigned int hbp_kernel_pos;
 
 #endif	/* __KERNEL__ */
-#endif	/* _ASM_GENERIC_HW_BREAKPOINT_H */
+#endif	/* _LINUX_HW_BREAKPOINT_H */