SWUTILS-806: Include PCIe Slot/Gen info to sfreport 'dmidecode -t slot'

[amitgu-xilinx]

Also fixes SWUTILS-941

[dchadwic-xilinx]

Test

[dchadwic-xilinx]

This grep will miss some slots on certain machines. For example, on dellr620g:

dellr620g: ~$ sudo dmidecode -t slot |egrep -a10 'PCIe Slot'

Perhaps only grep for PCI?

dellr620g: ~$ sudo dmidecode -t slot
# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.

Handle 0x0900, DMI type 9, 17 bytes
System Slot Information
	Designation: PCI1
	Type: x16 PCI Express 3
	Current Usage: In Use
	Length: Long
	ID: 1
	Characteristics:
		3.3 V is provided
		PME signal is supported
	Bus Address: 0000:41:00.0

Handle 0x0901, DMI type 9, 17 bytes
System Slot Information
	Designation: PCI2
	Type: x16 PCI Express 3
	Current Usage: In Use
	Length: Long
	ID: 2
	Characteristics:
		3.3 V is provided
		PME signal is supported
	Bus Address: 0000:05:00.0

[amitgu-xilinx]

dmidecode -t slot |grep -b10 'PCI Express'
might work better.

[amitgu-xilinx]

Have update. Can you please test on your servers.