mii-tool: dump also non standard registers

Read and dump all registers, including those not listed
in linux/mii.h.
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>

man/en_US/mii-tool.8

@@ -43,6 +43,11 @@ status for each interface.
 \fB\-v\fR, \fB\-\-verbose\fR
 Display more detailed MII status information.  If used twice, also
 display raw MII register contents.
+.br
+\fBAlert:\fR If used three times, will force reading all MII
+registers, including non standard ones. It's not guaranteed any
+valid answer from PHY while PHY communication can even hang.
+With driver e1000e will fail while reading register 0x07.
 .TP
 \fB\-V\fR, \fB\-\-version\fR
 Display program version information.

mii-tool.c

@@ -270,7 +270,10 @@ int show_basic_mii(int sock, int phy_id)
 		mii_val[i] = mdio_read(sock, i);
 		break;
 	    default:
-		mii_val[i] = 0;
+		if (verbose > 2)
+		    mii_val[i] = mdio_read(sock, i);
+		else
+		    mii_val[i] = 0;
 		break;
         }