ARM: OMAP1: use BUG_ON where possible

Just use BUG_ON() instead of constructions such as:

	if (...)
		BUG()

A simplified version of the semantic patch that makes this transformation
is as follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e;
@@
- if (e) BUG();
+ BUG_ON(e);
// </smpl>

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap1/board-fsample.c b/arch/arm/mach-omap1/board-fsample.c
index 4b6de70..756872e 100644
--- a/arch/arm/mach-omap1/board-fsample.c
+++ b/arch/arm/mach-omap1/board-fsample.c
@@ -307,8 +307,7 @@
 
 	fsample_init_smc91x();
 
-	if (gpio_request(FSAMPLE_NAND_RB_GPIO_PIN, "NAND ready") < 0)
-		BUG();
+	BUG_ON(gpio_request(FSAMPLE_NAND_RB_GPIO_PIN, "NAND ready") < 0);
 	gpio_direction_input(FSAMPLE_NAND_RB_GPIO_PIN);
 
 	omap_cfg_reg(L3_1610_FLASH_CS2B_OE);