Aarch64 regs: add X30
Aarch64 regs: add X30

Add missing X30 register to the aarch64 register set.

Note that we do not list X29 because it is the SP (stack frame pointer)
pwndbg/pwndbg,pwndbg/pwndbg,pwndbg/pwndbg,pwndbg/pwndbg