powerpc/eeh: Remove stale CAPI comment

Support for switching CAPI cards into and out of CAPI mode was removed a
while ago. Drop the comment since it's no longer relevant.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190903101605.2890-7-oohall@gmail.com

arch/powerpc/platforms/powernv/eeh-powernv.c

@@ -1125,13 +1125,6 @@ static int pnv_eeh_reset(struct eeh_pe *pe, int option)
 		return -EIO;
 	}
 
-	/*
-	 * If dealing with the root bus (or the bus underneath the
-	 * root port), we reset the bus underneath the root port.
-	 *
-	 * The cxl driver depends on this behaviour for bi-modal card
-	 * switching.
-	 */
 	if (pci_is_root_bus(bus) ||
 	    pci_is_root_bus(bus->parent))
 		return pnv_eeh_root_reset(hose, option);