fel: Enable the SMC workaround for H3/H5/A64/H64

Use a hardwired L.NOP instruction from the OpenRISC reset
vector as a way to check if the workaround is necessary.
Because these L.NOP instructions are guaranteed to be there
and are read-only, this is the most reliable non-invasive test.

Reading SID would be less reliable because it is one-time
programmable and theoretically may be set to zero on some boards.
Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>

soc_info.c

@@ -148,6 +148,8 @@ soc_info_t soc_info_table[] = {
 		.sid_base     = 0x01C14000,
 		.sid_offset   = 0x200,
 		.rvbar_reg    = 0x017000A0,
+		/* Check L.NOP in the OpenRISC reset vector */
+		.needs_smc_workaround_if_zero_word_at_addr = 0x40004,
 	},{
 		.soc_id       = 0x1639, /* Allwinner A80 */
 		.name         = "A80",
@@ -175,6 +177,8 @@ soc_info_t soc_info_table[] = {
 		.sid_base     = 0x01C14000,
 		.sid_offset   = 0x200,
 		.sid_fix      = true,
+		/* Check L.NOP in the OpenRISC reset vector */
+		.needs_smc_workaround_if_zero_word_at_addr = 0x40004,
 	},{
 		.soc_id       = 0x1681, /* Allwinner V3s */
 		.name         = "V3s",
@@ -193,6 +197,8 @@ soc_info_t soc_info_table[] = {
 		.sid_base     = 0x01C14000,
 		.sid_offset   = 0x200,
 		.rvbar_reg    = 0x017000A0,
+		/* Check L.NOP in the OpenRISC reset vector */
+		.needs_smc_workaround_if_zero_word_at_addr = 0x40004,
 	},{
 		.soc_id       = 0x1701, /* Allwinner R40 */
 		.name         = "R40",