arch/arm, arch/powerpc: add # of SEC engines on the SOC

Some SOCs, specifically the ones in the C29x familiy can have
multiple security engines. This patch adds a system configuration
define which indicates the maximum number of SEC engines that
can be found on a SoC.

Signed-off-by: Alex Porosanu <alexandru.porosanu@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

board/freescale/c29xpcie/c29xpcie.c

@@ -122,7 +122,7 @@ void fdt_del_sec(void *blob, int offset)
 
 	while ((nodeoff = fdt_node_offset_by_compat_reg(blob, "fsl,sec-v6.0",
 			CONFIG_SYS_CCSRBAR_PHYS + CONFIG_SYS_FSL_SEC_OFFSET
-			+ offset * 0x20000)) >= 0) {
+			+ offset * CONFIG_SYS_FSL_SEC_IDX_OFFSET)) >= 0) {
 		fdt_del_node(blob, nodeoff);
 		offset++;
 	}