[60/77] Pass scalar_int_modes to do_jump_by_parts_*

The callers of do_jump_by_parts_* had already established
that the modes were MODE_INTs, so this patch passes the
modes down as scalar_int_modes.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* dojump.c (do_jump_by_parts_greater_rtx): Change the type of
	the mode argument to scalar_int_mode.
	(do_jump_by_parts_zero_rtx): Likewise.
	(do_jump_by_parts_equality_rtx): Likewise.
	(do_jump_by_parts_greater): Take a mode argument.
	(do_jump_by_parts_equality): Likewise.
	(do_jump_1): Update calls accordingly.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r251512