docs: networking: phy: Fix a typo

Write "to be operated" instead of "to be operate".
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220610072809.352962-1-j.neuschaefer@gmx.netSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/networking/phy.rst

@@ -104,7 +104,7 @@ Whenever possible, use the PHY side RGMII delay for these reasons:
 
 * PHY device drivers in PHYLIB being reusable by nature, being able to
   configure correctly a specified delay enables more designs with similar delay
-  requirements to be operate correctly
+  requirements to be operated correctly
 
 For cases where the PHY is not capable of providing this delay, but the
 Ethernet MAC driver is capable of doing so, the correct phy_interface_t value