match recent Intel CPUs in fw_update(8)

match recent Intel CPUs in fw_update(8)

Intel CPUs mostly used to have processor name strings of the form
cpu0: Intel(R) Pentium(R) M processor 1.60GHz ("GenuineIntel" 686-class) 1.60 GHz, 06-0d-06
cpu0: Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz, 2494.61 MHz, 06-3d-04
recent CPUs use
cpu0: 11th Gen Intel(R) Core(TM) i5-1130G7 @ 1.10GHz, 30009.37 MHz, 06-8c-01
cpu0: 12th Gen Intel(R) Core(TM) i5-12400, 4390.71 MHz, 06-97-02
cpu0: 12th Gen Intel(R) Core(TM) i7-1260P, 1995.55 MHz, 06-9a-03

change pattern used to handle this

also covers oddities such as
cpu0: Genuine Intel(R) CPU @ 600MHz, 600.10 MHz
cpu0: Genuine Intel(R) CPU @ 1.00GHz, 1000.13 MHz, 06-26-01
cpu0: Genuine Intel(R) CPU L2400 @ 1.66GHz ("GenuineIntel" 686-class) 1.67 GHz, 06-0e-08

test chips use "Genuine Intel(R) CPU 0000"