rge.4: fix incorrect speed range in HARDWARE section

The HARDWARE section stated "PCIe 1GB to 1GB Ethernet devices"
which is incorrect. The RTL8125/8126/8127 chips support speeds
from 1Gbps to 10Gbps. Correct the range.

Signed-off-by: Christos Longros <chris.longros@gmail.com>

rge.4: note that the driver manages PHY directly

The rge(4) driver does not use the miibus(4) interface for PHY
management. Instead, it accesses PHY registers directly via the
chip's OCP (On-Chip Peripheral) bus. Document this in the
DESCRIPTION section.

Signed-off-by: Christos Longros <chris.longros@gmail.com>

Reviewed by:	adrian
Differential Revision:	https://reviews.freebsd.org/D55995

share/man/man4/rge.4

@@ -46,6 +46,11 @@ capable of TCP large send (TCP segmentation offload).
 .Pp
 The RTL8125, RTL8126 and RTL8127 devices are single-chip solutions combining
 both a MAC and PHY.
+The
+.Nm
+driver manages the PHY directly rather than using the
+.Xr miibus 4
+interface.
 Standalone cards are available in 1x PCIe models.
 .Pp
 The RTL8125, RTL8126 and RTL8127 also support jumbo frames, which can be
@@ -121,8 +126,18 @@ For more information on configuring this device, see
 .Sh HARDWARE
 The
 .Nm
-driver supports RealTek RTL8125, RTL8126, RTL8127 and Killer E3000 based
-PCIe 1GB to 1GB Ethernet devices.
+driver supports the following PCIe Ethernet adapters:
+.Pp
+.Bl -bullet -compact
+.It
+RealTek RTL8125 (up to 2.5 Gbps)
+.It
+RealTek RTL8126 (up to 5 Gbps)
+.It
+RealTek RTL8127 (up to 10 Gbps)
+.It
+Killer E3000 (up to 2.5 Gbps)
+.El
 .Sh SYSCTL VARIABLES
 The following variables are available as both
 .Xr sysctl 8