print/epson-inkjet-printer-escpr2: unbreak builk build on non-x86

[00:02:10] Warning: (print/epson-inkjet-printer-escpr2): make: "/usr/ports/print/epson-inkjet-printer-escpr2/Makefile" line 48: unsupported architectures powerpc64le
[00:02:10] Warning: (print/epson-inkjet-printer-escpr2): Error: Error looking up dependencies for print/epson-inkjet-printer-escpr2