server-info should use configured clockspeed instead of maximum for ram

[strizhechenko]

Handle 0x1101, DMI type 17, 34 bytes
Memory Device
	Array Handle: 0x1000
	Error Information Handle: Not Provided
	Total Width: 72 bits
	Data Width: 64 bits
	Size: 4096 MB
	Form Factor: DIMM
	Set: 1
	Locator: DIMM_A2 
	Bank Locator: Not Specified
	Type: DDR3
	Type Detail: Synchronous Registered (Buffered)
	Speed: 1600 MHz
	Manufacturer: 00AD04B300AD
	Serial Number: 4A87CE52
	Asset Tag: 01121621
	Part Number: HMT351R7CFR8C-PB  
	Rank: 2
	Configured Clock Speed: 1067 MHz