arm: socfpga: misc: Reset ethernet from OF

Reset the GMAC ethernets based on the "resets" OF node instead of ad-hoc
hardcoded values in the U-Boot code. Since we don't have a proper reset
framework in place yet, we have to do this slightly ad-hoc parsing of the
OF tree instead.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>

lib/fdtdec.c

@@ -75,6 +75,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
 	COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
 	COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
 	COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"),
+	COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
 };
 
 const char *fdtdec_get_compatible(enum fdt_compat_id id)