octopus: Add Casta to list of octopus platform name

BUG=b:122325056
BRANCH=None
TEST=run mosys on Casta board.
     check if it works fine or not.

Change-Id: I5956a560d64f9351c0f3cb16798b2cbea06c6f85
Signed-off-by: Jongpil Jung <jongpil19.jung@samsung.com>
Reviewed-on: https://chromium-review.googlesource.com/1395899
Commit-Ready: Jongpil Jung <jongpil19.jung@samsung.corp-partner.google.com>
Tested-by: Jongpil Jung <jongpil19.jung@samsung.corp-partner.google.com>
Reviewed-by: Philip Chen <philipchen@chromium.org>
diff --git a/platform/octopus/octopus.c b/platform/octopus/octopus.c
index 74ebb48..ade1746 100644
--- a/platform/octopus/octopus.c
+++ b/platform/octopus/octopus.c
@@ -60,7 +60,8 @@
 	NULL
 };
 
-static const char *platform_names = "Ampton,Bip,Bobba,Fleex,Meep,Phaser,Yorp";
+static const char *platform_names = "Ampton,Bip,Bobba,Casta,Fleex,Meep,Phaser,"
+				    "Yorp";
 
 int octopus_probe(struct platform_intf *intf)
 {