riscv: Rename SiFive CLINT to RISC-V ALINT

As the RISC-V ACLINT specification is defined to be backward compatible
with the SiFive CLINT specification, we rename SiFive CLINT to RISC-V
ALINT in the source tree to be future-proof.

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Rick Chen <rick@andestech.com>
diff --git a/board/openpiton/riscv64/Kconfig b/board/openpiton/riscv64/Kconfig
index eb0db8a..21da1dc 100644
--- a/board/openpiton/riscv64/Kconfig
+++ b/board/openpiton/riscv64/Kconfig
@@ -29,7 +29,7 @@
 	select SUPPORT_SPL
 	imply CPU_RISCV
 	imply RISCV_TIMER
-	imply SPL_SIFIVE_CLINT
+	imply SPL_RISCV_ACLINT
 	imply CMD_CPU
 	imply SPL_CPU_SUPPORT
 	imply SPL_SMP