infcall-nested-structs: Test up to five fields

infcall-nested-structs: Test up to five fields

Aarch64 can pass structures of up to four members of identical
types in float registers (See AAPCS 5.3 and 5.4). Expand test to
cover this.

Remove the need to specify an additional sets of structures if tB
is not defined.

gdb/testsuite/
	* gdb.base/infcall-nested-structs.c (struct struct01): Remove.
	(struct struct02): Likewise.
	(struct struct03): Likewise.
	(struct struct04): Likewise.
	(struct struct_01_01): New struct.
	(struct struct_01_02): Likewise.
	(struct struct_01_03): Likewise.
	(struct struct_01_04): Likewise.
	(struct struct_02_01): Likewise.
	(struct struct_02_02): Likewise.
	(struct struct_02_03): Likewise.
	(struct struct_02_04): Likewise.
	(struct struct_04_01): Likewise.
	(struct struct_04_02): Likewise.
	(struct struct_04_03): Likewise.
	(struct struct_04_04): Likewise.
	(struct struct_05_01): Likewise.
	(struct struct_05_02): Likewise.
	(struct struct_05_03): Likewise.
	(struct struct_05_04): Likewise.
	(cmp_struct01): Remove function.
	(cmp_struct02): Likewise.
	(cmp_struct03): Likewise.
	(cmp_struct04): Likewise.
	(cmp_struct_01_01): Add Function.
	(cmp_struct_01_02): Likewise.
	(cmp_struct_01_03): Likewise.
	(cmp_struct_01_04): Likewise.
	(cmp_struct_02_01): Likewise.
	(cmp_struct_02_02): Likewise.
	(cmp_struct_02_03): Likewise.
	(cmp_struct_02_04): Likewise.
	(cmp_struct_04_01): Likewise.
	(cmp_struct_04_02): Likewise.
	(cmp_struct_04_03): Likewise.
	(cmp_struct_04_04): Likewise.
	(cmp_struct_05_01): Likewise.
	(cmp_struct_05_02): Likewise.
	(cmp_struct_05_03): Likewise.
	(cmp_struct_05_04): Likewise.
	(call_all): Add new structs.
	* gdb.base/infcall-nested-structs.exp: Likewise.