Reduce default verbosity of SPI flash drivers

Only print PP: lines if CONFIG_DEBUG_SPI_FLASH is enabled.

Change-Id: If25e916ecb585f37c90d42980e933a6cd1a3d956
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/1045
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/drivers/spi/eon.c

@@ -85,9 +85,11 @@ static int eon_write(struct spi_flash *flash,
 		cmd[2] = page_addr;
 		cmd[3] = byte_addr;
 
+#if CONFIG_DEBUG_SPI_FLASH
 		printk(BIOS_SPEW,
 		    "PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\n",
 		     buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
+#endif
 
 		ret = spi_flash_cmd(flash->spi, CMD_EN25Q128_WREN, NULL, 0);
 		if (ret < 0) {