um: Split out default elf_aux_hwcap

Setting all auxiliary vector values to default values if one of them
was not provided by the host will discard perfectly fine values.

Remove the elf_aux_platform fallback from the vDSO ones.
As zero is the correct fallback anyways, don't create a new conditional.

Signed-off-by: Thomas Weißschuh <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Johannes Berg <[e-mail]>

arch/um/os-Linux/elf_aux.c

···
 		}
 	}
 	if ( ! __kernel_vsyscall || ! vsyscall_ehdr ||
-	     ! elf_aux_hwcap ||
 	     ! page_size || (vsyscall_ehdr % page_size) ) {
 		__kernel_vsyscall = 0;
 		vsyscall_ehdr = 0;
-		elf_aux_hwcap = 0;
 	}
 	else {
 		vsyscall_end = vsyscall_ehdr + page_size;