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aijuboard bootloader: fix 10BASE-T / 100BASE-TX support

--- a/sys/src/boot/zynq/net.c

+++ b/sys/src/boot/zynq/net.c

@@ -168,6 +168,7 @@

 		while((mdread(r, MDSTATUS) & LINK) == 0)

 			;

 	}

+	*(u32int*)(SLCR_BASE + SLCR_UNLOCK) = UNLOCK_KEY;

 	v = mdread(r, MDPHYCTRL);

 	if((v & 0x40) != 0){

 		puts("1000BASE-T");

@@ -174,14 +175,18 @@

 		while((mdread(r, MDGSTATUS) & RECVOK) != RECVOK)

 			;

 		r[NET_CFG] |= GIGE_EN;

+		*(u32int*)(SLCR_BASE + GEM0_CLK_CTRL) = 1 << 20 | 8 << 8 | 1;

 	}else if((v & 0x20) != 0){

 		puts("100BASE-TX");

-		r[NET_CFG] = NET_CFG & ~GIGE_EN | SPEED;

+		r[NET_CFG] = r[NET_CFG] & ~GIGE_EN | SPEED;

+		*(u32int*)(SLCR_BASE + GEM0_CLK_CTRL) = 5 << 20 | 8 << 8 | 1;

 	}else if((v & 0x10) != 0){

 		puts("10BASE-T");

-		r[NET_CFG] = NET_CFG & ~(GIGE_EN | SPEED);

+		r[NET_CFG] = r[NET_CFG] & ~(GIGE_EN | SPEED);

+		*(u32int*)(SLCR_BASE + GEM0_CLK_CTRL) = 20 << 20 | 20 << 8 | 1;

 	}else

 		puts("???");

+	*(u32int*)(SLCR_BASE + SLCR_UNLOCK) = LOCK_KEY;

 	if((v & 0x08) != 0)

 		puts(" Full Duplex\n");

 	else{