Add a fallback to abort() call (in head_fsl_booke.S) to be able to
successfully reset some older freescale power devices (i.e. mpc8540)
which don't have a rstcr register.

Signed-off-by: Clemens Koller <clemens.koller@anagramm.de>

diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
index 3ace747..6fe674a 100644
--- a/arch/powerpc/sysdev/fsl_soc.c
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -42,6 +42,7 @@
 extern void init_fcc_ioports(struct fs_platform_info*);
 extern void init_fec_ioports(struct fs_platform_info*);
 extern void init_smc_ioports(struct fs_uart_platform_info*);
+extern void abort(void);
 static phys_addr_t immrbase = -1;
 
 phys_addr_t get_immrbase(void)
@@ -1336,6 +1337,8 @@ void fsl_rstcr_restart(char *cmd)
 	if (rstcr)
 		/* set reset control register */
 		out_be32(rstcr, 0x2);	/* HRESET_REQ */
+	else
+		abort();
 
 	while (1) ;
 }