spl: Allow remoteproc drivers to be used within SPL

Add an option for building remoteproc drivers within SPL.

Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/drivers/Makefile b/drivers/Makefile
index c012476..23ea609 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -15,6 +15,7 @@
 obj-$(CONFIG_$(SPL_TPL_)SPI_SUPPORT) += spi/
 obj-$(CONFIG_$(SPL_TPL_)TIMER) += timer/
 obj-$(CONFIG_$(SPL_)DM_MAILBOX) += mailbox/
+obj-$(CONFIG_$(SPL_)REMOTEPROC) += remoteproc/
 
 ifndef CONFIG_TPL_BUILD
 ifdef CONFIG_SPL_BUILD
@@ -102,7 +103,6 @@
 # SOC specific infrastructure drivers.
 obj-y += smem/
 obj-y += soc/
-obj-$(CONFIG_REMOTEPROC) += remoteproc/
 obj-y += thermal/
 obj-y += axi/