AArch64: Fix initializer for array so it's a C initializer instead of C++.

AArch64: Fix initializer for array so it's a C initializer instead of C++.

This fixes a missing = that would cause the array initializer to be a C++
initializer instead of a C one, causing a warning when building with pre-C++11
standards compiler.

Committed under the GCC obvious rules.

gcc/ChangeLog:

	* config/aarch64/aarch64-builtins.c (aarch64_fcmla_lane_builtin_data):
	Make it a C initializer.

From-SVN: r268614