[75/77] Use scalar_mode in the AArch64 port

[75/77] Use scalar_mode in the AArch64 port

Similar to the previous scalar_int_mode patch.

2017-09-05  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* config/aarch64/aarch64-protos.h (aarch64_gen_adjusted_ldpstp):
	Take a scalar_mode rather than a machine_mode.
	(aarch64_operands_adjust_ok_for_ldpstp): Likewise.
	* config/aarch64/aarch64.c (aarch64_simd_container_mode): Likewise.
	(aarch64_operands_adjust_ok_for_ldpstp): Likewise.
	(aarch64_gen_adjusted_ldpstp): Likewise.
	(aarch64_expand_vector_init): Use scalar_mode instead of machine_mode.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251736