fixrsdp: Remove flock
fixrsdp: Remove flock

Expecting the kernel to have flock support has caused more problems than
this has solved. No other u-root command is using flock on /dev/mem, so
this did not have much value. Really, the fixrsdp command should be
implement in kernel code.

Signed-off-by: Ryan O'Leary <32139beaa9c574695821e85473b09a4e33316467@google.com>

u-root/u-root,u-root/u-root,u-root/u-root