system_LPC17xx: turn the system clock up to 120MHz
system_LPC17xx: turn the system clock up to 120MHz

Signed-off-by: Neil MacMunn <822ec91a7ef82248fd36162ca8ac3283eba70848@gumstix.com>

robovero/firmware,dnnychan/aerodroid,tauvetech/firmware-robovero,nickng/hexacopter-firmware,tauvetech/firmware-robovero,nickng/hexacopter-firmware,tauvetech/firmware-robovero,robovero/firmware,nickng/hexacopter-firmware,dnnychan/aerodroid,dnnychan/aerodroid