staging: wilc1000: remove variable tx_buffer_size

This patch removes unnecessary two variables tx_buffer_size and just use
LINUX_TX_SIZE as argument.

Signed-off-by: Glen Lee <glen.lee@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/wilc1000/wilc_wlan.c b/drivers/staging/wilc1000/wilc_wlan.c
index bd7c59d..9217b18 100644
--- a/drivers/staging/wilc1000/wilc_wlan.c
+++ b/drivers/staging/wilc1000/wilc_wlan.c
@@ -58,7 +58,6 @@
 	/**
 	 *      TX buffer
 	 **/
-	u32 tx_buffer_size;
 	u8 *tx_buffer;
 	u32 tx_buffer_offset;
 
@@ -873,7 +872,7 @@
 				if (vmm_sz & 0x3) {                                                                                                     /* has to be word aligned */
 					vmm_sz = (vmm_sz + 4) & ~0x3;
 				}
-				if ((sum + vmm_sz) > p->tx_buffer_size) {
+				if ((sum + vmm_sz) > LINUX_TX_SIZE) {
 					break;
 				}
 				PRINT_D(TX_DBG, "VMM Size AFTER alignment = %d\n", vmm_sz);
@@ -1970,7 +1969,6 @@
 	memcpy((void *)&g_wlan.io_func, (void *)&inp->io_func, sizeof(wilc_wlan_io_func_t));
 	g_wlan.txq_lock = inp->os_context.txq_critical_section;
 
-	g_wlan.tx_buffer_size = inp->os_context.tx_buffer_size;
 #if defined (MEMORY_STATIC)
 	g_wlan.rx_buffer_size = inp->os_context.rx_buffer_size;
 #endif
@@ -2017,7 +2015,7 @@
 	 *      alloc tx, rx buffer
 	 **/
 	if (g_wlan.tx_buffer == NULL)
-		g_wlan.tx_buffer = kmalloc(g_wlan.tx_buffer_size, GFP_KERNEL);
+		g_wlan.tx_buffer = kmalloc(LINUX_TX_SIZE, GFP_KERNEL);
 	PRINT_D(TX_DBG, "g_wlan.tx_buffer = %p\n", g_wlan.tx_buffer);
 
 	if (g_wlan.tx_buffer == NULL) {