livepatch: ARM 32|64: Ignore mapping symbols: $[d,a,x]

livepatch: ARM 32|64: Ignore mapping symbols: $[d,a,x]

Those symbols are used to help final linkers to replace insn.
The ARM ELF specification mandates that they are present
to denote the start of certain CPU features. There are two
variants of it - short and long format.

Either way - we can ignore these symbols.

Reviewed-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Acked-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> [x86 bits]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>