Thanks everyone and I thought amd processors could be overclocked that's why I asked if this laptop could be overclocked or is 2.2 fast enough?
Not in a laptop. Your chances to be able to overclock and chances of stable overclocking for significant gains are nearly non-existent in laptops, doesn't matter who makes the CPU. The only instances where I know you can overclock the CPU are in the desktop replacement (DTR) laptop category, but then they are hulking, huge and power hungry and meant to be used literally as desktops, but even in the DTRs, this is exceedingly rare.
2.2 is plenty if you only want to do simple things like browse the web, office like applications, HD videos, etc... It is not enough for anything thing else.
I'm not sure which computer you are looking at with a 2.2ghz processor. Is it an Intel or AMD ? Your original laptop choices included a A6-4455m which is an Ultra Low Voltage processor with low power consumption meant for ultrabooks or the like. The performance (CPU+Graphics) on that ULV processor is very low. The A8-4500m is nearly twice as fast in CPU+GPU applications (games). But none of them are clocked exactly at 2.2ghz...
If it is an Intel i7 with 2.2ghz, then that's plenty, due to far better IPC and turbo.