b43: N-PHY: add shared memory offsets definitions

#define B43_SHM_SH_MAXBFRAMES		0x0080	/* Maximum number of frames in a burst */

#define B43_SHM_SH_SPUWKUP		0x0094	/* pre-wakeup for synth PU in us */

#define B43_SHM_SH_PRETBTT		0x0096	/* pre-TBTT in us */

/* SHM_SHARED tx iq workarounds */

#define B43_SHM_SH_NPHY_TXIQW0		0x0700

#define B43_SHM_SH_NPHY_TXIQW1		0x0702

#define B43_SHM_SH_NPHY_TXIQW2		0x0704

#define B43_SHM_SH_NPHY_TXIQW3		0x0706

/* SHM_SHARED tx pwr ctrl */

#define B43_SHM_SH_NPHY_TXPWR_INDX0	0x0708

#define B43_SHM_SH_NPHY_TXPWR_INDX1	0x070E

/* SHM_SCRATCH offsets */

#define B43_SHM_SC_MINCONT		0x0003	/* Minimum contention window */