I was trying to compile a new kernel that included the ethersis[1] driver,
but I come across the following error when running `mk 'CONF=pcf'`

	8c -FTVw ethersis.c
	ethersis.c:118 external redeclaration of: Sse
		GLOBL ENUM ethersis.c:118
		GLOBL ENUM <eof>
	mk: 8c -FTVw ethersis.c  : exit status=rc 3504: 8c 3506: error

I did some grepping in /sys/src/9/pc and found out that dat.h declares
Sse first.  Anyone know a workaround? My config for the kernel is the
normal pcf config, with the following change:

	% 9 diff -c pcf pcfn 
	pcf:65,70 - pcfn:65,72
		ethersink
		ethersmc	devi82365 cis
		etherwavelan	wavelan devi82365 cis pci
	+ # sis 900
	+ 	ethersis	pci
		ethermedium
		pcmciamodem
		netdevmedium

[1]http://mirtchovski.com/lanlp9/sis900/ethersis.c