Yes you can. FS1 is the mobile socket and it's exactly that, a socket. You can put any FS1 CPU into that socket and it'll work.
Now for the warning that goes with the above. Mobile laptops are designed with a very tight power / heat envelope, putting a CPU that the laptop was not designed for into it could cause heat issues and possibly instability from it drawing too much power.
Also locked memory bus speeds might become an issue depending on the CPU you have and what your trying to put inside.http://forum.notebookreview.com/hp-pavilion-notebooks/621678-hp-dv6z-a8-3530mx-processor-upgrade.html