char: xilinx_hwicap: Remove pointless local variables

Remove unused variables which generates these warnings:
[linux-4.10-rc5/drivers/char/xilinx_hwicap/buffer_icap.c:301]: (style)
Variable 'num_writes' is modified but its new value is never used.
[linux-4.10-rc5/drivers/char/xilinx_hwicap/buffer_icap.c:356]: (style)
Variable 'read_count' is modified but its new value is never used.
Reported-by: NDavid Binderman <dcb314@hotmail.com>
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/char/xilinx_hwicap/buffer_icap.c

@@ -269,7 +269,6 @@ int buffer_icap_set_configuration(struct hwicap_drvdata *drvdata, u32 *data,
 {
 	int status;
 	s32 buffer_count = 0;
-	s32 num_writes = 0;
 	bool dirty = false;
 	u32 i;
 	void __iomem *base_address = drvdata->base_address;
@@ -298,7 +297,6 @@ int buffer_icap_set_configuration(struct hwicap_drvdata *drvdata, u32 *data,
 		}
 
 		buffer_count = 0;
-		num_writes++;
 		dirty = false;
 	}
 
@@ -328,7 +326,6 @@ int buffer_icap_get_configuration(struct hwicap_drvdata *drvdata, u32 *data,
 {
 	int status;
 	s32 buffer_count = 0;
-	s32 read_count = 0;
 	u32 i;
 	void __iomem *base_address = drvdata->base_address;
 
@@ -353,7 +350,6 @@ int buffer_icap_get_configuration(struct hwicap_drvdata *drvdata, u32 *data,
 			}
 
 			buffer_count = 0;
-			read_count++;
 		}
 
 		/* Copy data from bram */