drm/dp-helper: Move the legacy helpers to gma500

Except for gma500 all drivers are converted to the new style helpers,
which have much better abstraction of the underlying hw protocols and
already much more helper functions (including the entire mst library)
on top of them. Since no one seems to work on converting gma500 let's
just move the code away so that new drivers don't end up accidentally
using this.

Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Reviewed-by: Alan Cox <alan@linux.intel.com>
[danvet: Add __deprecated as requested by Alan. Also add a short FIXME
comment and drop the EXPORT_SYMBOL which is no longer needed.]
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

include/drm/drm_dp_helper.h

@@ -404,26 +404,6 @@
 #define MODE_I2C_READ	4
 #define MODE_I2C_STOP	8
 
-/**
- * struct i2c_algo_dp_aux_data - driver interface structure for i2c over dp
- * 				 aux algorithm
- * @running: set by the algo indicating whether an i2c is ongoing or whether
- * 	     the i2c bus is quiescent
- * @address: i2c target address for the currently ongoing transfer
- * @aux_ch: driver callback to transfer a single byte of the i2c payload
- */
-struct i2c_algo_dp_aux_data {
-	bool running;
-	u16 address;
-	int (*aux_ch) (struct i2c_adapter *adapter,
-		       int mode, uint8_t write_byte,
-		       uint8_t *read_byte);
-};
-
-int
-i2c_dp_aux_add_bus(struct i2c_adapter *adapter);
-
-
 #define DP_LINK_STATUS_SIZE	   6
 bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE],
 			  int lane_count);