trusty: Allow getting trusty memsize from BL32_MEM_SIZE instead of TSP_SEC_MEM_SIZE

Some platforms define BL32_MEM_SIZE instead of TSP_SEC_MEM_SIZE, but
the meaning is the same.

Change-Id: I93d96dca442e653435cae6a165b1955efe2d2b75
Signed-off-by: Arve Hjønnevåg <arve@android.com>

services/spd/trusty/trusty.c

@@ -390,6 +390,10 @@ static const spd_pm_ops_t trusty_pm = {
 
 void plat_trusty_set_boot_args(aapcs64_params_t *args);
 
+#if !defined(TSP_SEC_MEM_SIZE) && defined(BL32_MEM_SIZE)
+#define TSP_SEC_MEM_SIZE BL32_MEM_SIZE
+#endif
+
 #ifdef TSP_SEC_MEM_SIZE
 #pragma weak plat_trusty_set_boot_args
 void plat_trusty_set_boot_args(aapcs64_params_t *args)