Power to the fuses

[stefanrueger]

For the parts ata5790 and ata5795 some fuse bit masks are defined wrongly as 2 to (2 to the power of the bit number), eg,

avr-libc/include/avr/ioa5790.h

Lines 828 to 835 in 55e8cac

	#define FUSE_CKDIV8 (unsigned char)~_BV(128)
	#define FUSE_DWEN (unsigned char)~_BV(64)
	#define FUSE_SPIEN (unsigned char)~_BV(32)
	#define FUSE_WDTON (unsigned char)~_BV(16)
	#define FUSE_EESAVE (unsigned char)~_BV(8)
	#define FUSE_Reserved (unsigned char)~_BV(4)
	#define FUSE__32OEN (unsigned char)~_BV(2)
	#define FUSE_EXTCLKEN (unsigned char)~_BV(1)