boards/x86: Use right GPIO names for CC2520

GPIO_QMSI_<0/1>_NAME are now generated through DTS. Until CC2520
settings are generated through DTS, let's use direct gpio names
instead.

Fixes #8086

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>