target_ops mask_watchpoint: change int to target_hw_bp_type

target_ops mask_watchpoint: change int to target_hw_bp_type

Fixes:

/home/simark/src/binutils-gdb/gdb/ppc-linux-nat.c: In function ‘int ppc_linux_insert_mask_watchpoint(target_ops*, CORE_ADDR, CORE_ADDR, int)’:
/home/simark/src/binutils-gdb/gdb/ppc-linux-nat.c:1730:40: error: invalid conversion from ‘int’ to ‘target_hw_bp_type’ [-fpermissive]
   p.trigger_type = get_trigger_type (rw);
                                        ^

gdb/ChangeLog:

	* ppc-linux-nat.c (ppc_linux_insert_mask_watchpoint): Change
	type of rw to enum target_hw_bp_type.
	(ppc_linux_remove_mask_watchpoint): Likewise.
	* target.c (target_insert_mask_watchpoint): Likewise.
	(target_remove_mask_watchpoint): Likewise.
	* target.h (target_insert_mask_watchpoint): Likewise.
	(target_remove_mask_watchpoint): Likewise.
	(struct target_ops) <to_insert_mask_watchpoint>: Likewise.
	(struct target_ops) <to_remove_mask_watchpoint>: Likewise.
	* target-delegates.c: Regenerate.