global_data: remove unused mxc_i2c specific field

The srdata field is unused since commit 71204e95ce13228 ("i2c: mxc:
refactor i2c driver and support dm").

Cc: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h
index 7587ba2..5d02732 100644
--- a/include/asm-generic/global_data.h
+++ b/include/asm-generic/global_data.h
@@ -90,9 +90,6 @@
 #if defined(CONFIG_SYS_I2C)
 	int		cur_i2c_bus;	/* current used i2c bus */
 #endif
-#ifdef CONFIG_SYS_I2C_MXC
-	void *srdata[10];
-#endif
 	unsigned int timebase_h;
 	unsigned int timebase_l;
 #if CONFIG_VAL(SYS_MALLOC_F_LEN)