soundwire: intel: remove IPPTR unused definition

This read-only register only defines an offset which is known already
and a version which isn't used.

Remove unused definition.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220823053846.2684635-4-yung-chuan.liao@linux.intel.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

include/linux/soundwire/sdw_intel.h

@@ -27,7 +27,6 @@
 #define SDW_SHIM_LCTL_CPA		BIT(8)
 #define SDW_SHIM_LCTL_CPA_MASK		GENMASK(11, 8)
 
-#define SDW_SHIM_IPPTR			0x8
 #define SDW_SHIM_SYNC			0xC
 
 #define SDW_SHIM_CTLSCAP(x)		(0x010 + 0x60 * (x))