media: staging: atomisp: Remove dead code for MID (#2)

intel_mid_soc_stepping() is not used anywhere.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/atomisp/include/asm/intel_mid_pcihelpers.h

@@ -24,4 +24,3 @@ void intel_mid_msgbus_write32_raw(u32 cmd, u32 data);
 void intel_mid_msgbus_write32(u8 port, u32 addr, u32 data);
 u32 intel_mid_msgbus_read32_raw_ext(u32 cmd, u32 cmd_ext);
 void intel_mid_msgbus_write32_raw_ext(u32 cmd, u32 cmd_ext, u32 data);
-u32 intel_mid_soc_stepping(void);

drivers/staging/media/atomisp/platform/intel-mid/intel_mid_pcihelpers.c

@@ -154,10 +154,3 @@ void intel_mid_msgbus_write32(u8 port, u32 addr, u32 data)
 	spin_unlock_irqrestore(&msgbus_lock, irq_flags);
 }
 EXPORT_SYMBOL(intel_mid_msgbus_write32);
-
-/* called only from where is later then fs_initcall */
-u32 intel_mid_soc_stepping(void)
-{
-	return pci_root->revision;
-}
-EXPORT_SYMBOL(intel_mid_soc_stepping);