Ethernet OPTA: fix crash when DHCP is used on fast DHCP server #903
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maidnl force-pushed the investigate_ethernet_issue branch from 026e42c to 308d1fa Compare 
| This pull request is not needed. Found the root cause of the crashes elsewhere. |
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In some cases, when using a DHCP on an embedded device (like portenta X8) it has been observed an OPTA crash.
This patch keep the Ethernet PHY reset for a little at the beginning so that Ethernet irqs start "arriving" when all is properly set -up.
OPTA: keep ethernet phy under reset at boot