drm/i915: Add new INSTDONE registers

#define IPEIR_I965	0x02064

#define IPEHR_I965	0x02068

#define INSTDONE_I965	0x0206c

#define I915_NUM_INSTDONE_REG	2

#define GEN7_INSTDONE_1		0x0206c

#define GEN7_SC_INSTDONE	0x07100

#define GEN7_SAMPLER_INSTDONE	0x0e160

#define GEN7_ROW_INSTDONE	0x0e164

#define I915_NUM_INSTDONE_REG	4

#define RING_IPEIR(base)	((base)+0x64)

#define RING_IPEHR(base)	((base)+0x68)

#define RING_INSTDONE(base)	((base)+0x6c)