Add support for SIOCGMIIPHY and SIOCGMIIREG ioctls.

[bernhardu]

When recording gnome-nettool or mii-tool rr throws assertions like these:

$ bin/rr record /sbin/mii-tool enp7s0
rr: Saving execution to trace directory `/home/bernhard/data/entwicklung/2023/rr/rr-recordings/mii-tool-1'.
[FATAL src/record_syscall.cc:6564:rec_process_syscall_arch()] 
 (task 537273 (rec:537273) at time 139)
 -> Assertion `t->regs().syscall_result_signed() == -syscall_state.expect_errno' failed to hold. Expected EINVAL for 'ioctl' but got result -1 (errno EPERM); Unknown ioctl(0x8947): type:0x89 nr:0x47 dir:0 size:0 addr:0x5607c41203e0

[FATAL src/record_syscall.cc:6565:rec_process_syscall_arch()] 
 (task 596577 (rec:596577) at time 742)
 -> Assertion `t->regs().syscall_result_signed() == -syscall_state.expect_errno' failed to hold. Expected EINVAL for 'ioctl' but got result -1 (errno EPERM); Unknown ioctl(0x8948): type:0x89 nr:0x48 dir:0 size:0 addr:0x7f11cf5defd8

https://github.com/torvalds/linux/blob/0106679839f7c69632b3b9833c3268c316c0a9fc/include/uapi/linux/sockios.h#L104-L106

This two patches are just enough to make rr no longer fail.