arm, arm926ejs: Enable icache only if CONFIG_SYS_ICACHE_OFF is not defined

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Tom Rini <trini@ti.com>
Acked-by: Heiko Schocher <hs@denx.de>
Tested-by: Heiko Schocher <hs@denx.de>

arch/arm/cpu/arm926ejs/start.S

@@ -369,7 +369,8 @@ flush_dcache:
 	mcr	p15, 0, r0, c7, c5, 0	/* invalidate I Cache */
 
 	/*
-	 * disable MMU and D cache, and enable I cache
+	 * disable MMU and D cache
+	 * enable I cache if CONFIG_SYS_ICACHE_OFF is not defined
 	 */
 	mrc	p15, 0, r0, c1, c0, 0
 	bic	r0, r0, #0x00000300	/* clear bits 9:8 (---- --RS) */
@@ -380,7 +381,9 @@ flush_dcache:
 	bic	r0, r0, #0x00002000	/* clear bit 13 (--V- ----) */
 #endif
 	orr	r0, r0, #0x00000002	/* set bit 2 (A) Align */
+#ifndef CONFIG_SYS_ICACHE_OFF
 	orr	r0, r0, #0x00001000	/* set bit 12 (I) I-Cache */
+#endif
 	mcr	p15, 0, r0, c1, c0, 0
 
 	/*