drivers: lora: Convert drivers to new DT device macros

Convert lora drivers from:

        DEVICE_AND_API_INIT -> DEVICE_DT_INST_DEFINE

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
diff --git a/drivers/lora/sx126x.c b/drivers/lora/sx126x.c
index be991a7..c2868b0 100644
--- a/drivers/lora/sx126x.c
+++ b/drivers/lora/sx126x.c
@@ -518,7 +518,6 @@
 	.test_cw = sx12xx_lora_test_cw,
 };
 
-DEVICE_AND_API_INIT(sx126x_lora, DT_INST_LABEL(0),
-		    &sx126x_lora_init, NULL,
+DEVICE_DT_INST_DEFINE(0, &sx126x_lora_init, device_pm_control_nop, NULL,
 		    NULL, POST_KERNEL, CONFIG_LORA_INIT_PRIORITY,
 		    &sx126x_lora_api);
diff --git a/drivers/lora/sx1276.c b/drivers/lora/sx1276.c
index cbc49da..d310696 100644
--- a/drivers/lora/sx1276.c
+++ b/drivers/lora/sx1276.c
@@ -561,7 +561,6 @@
 	.test_cw = sx12xx_lora_test_cw,
 };
 
-DEVICE_AND_API_INIT(sx1276_lora, DT_INST_LABEL(0),
-		    &sx1276_lora_init, NULL,
+DEVICE_DT_INST_DEFINE(0, &sx1276_lora_init, device_pm_control_nop, NULL,
 		    NULL, POST_KERNEL, CONFIG_LORA_INIT_PRIORITY,
 		    &sx1276_lora_api);