spi: zynq_[q]spi: Convert config's to macro's

Remove below config options and convert them to macros. They have never
been configured to different values than default one. And also it makes
sense to reduce the config_whitelist.
CONFIG_SYS_ZYNQ_SPI_WAIT
CONFIG_SYS_ZYNQ_QSPI_WAIT
CONFIG_XILINX_SPI_IDLE_VAL

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/drivers/spi/zynq_qspi.c b/drivers/spi/zynq_qspi.c
index db473da..3f39ef0 100644
--- a/drivers/spi/zynq_qspi.c
+++ b/drivers/spi/zynq_qspi.c
@@ -47,9 +47,7 @@
 #define ZYNQ_QSPI_CR_SS_SHIFT		10	/* Slave select shift */
 
 #define ZYNQ_QSPI_FIFO_DEPTH		63
-#ifndef CONFIG_SYS_ZYNQ_QSPI_WAIT
-#define CONFIG_SYS_ZYNQ_QSPI_WAIT	CONFIG_SYS_HZ/100	/* 10 ms */
-#endif
+#define ZYNQ_QSPI_WAIT			(CONFIG_SYS_HZ / 100)	/* 10 ms */
 
 /* zynq qspi register set */
 struct zynq_qspi_regs {
@@ -350,7 +348,7 @@
 	do {
 		status = readl(&regs->isr);
 	} while ((status == 0) &&
-		(get_timer(timeout) < CONFIG_SYS_ZYNQ_QSPI_WAIT));
+		(get_timer(timeout) < ZYNQ_QSPI_WAIT));
 
 	if (status == 0) {
 		printf("zynq_qspi_irq_poll: Timeout!\n");