Component editor 7.2 does not provide support for the "resetrequest" signal type. However, this is a valid Avalon® signal and its use is supported during SOPC Builder generation.
As a workaround set the signal type for your Avalon component to "read" in the component editor. Then save your component close both the component editor and SOPC Builder and open the *_hw.tcl file for your component.
Search the TCL file for the line that assigns the resetrequest signal. It should resemble:
add_port_to_interface "avalon_master" "resetrequest" "read"
Change this to read:
add_port_to_interface "avalon_master" "resetrequest" "resetrequest"
Then open SOPC Builder and generate your system. SOPC Builder will generate a warning message indicating that resetrequest is an unknown signal type. However, you can safely ignore this warning.