lib: Add VPL options for SHA1 and SHA256

Add these options so these algorithms can be used in VPL.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/Kconfig b/lib/Kconfig
index 1c93f52..0831884 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -579,6 +579,26 @@
 
 endif
 
+config VPL_SHA1
+	bool "Enable SHA1 support in VPL"
+	depends on VPL
+	default y if SHA1
+	help
+	  This option enables support of hashing using SHA1 algorithm.
+	  The hash is calculated in software.
+	  The SHA1 algorithm produces a 160-bit (20-byte) hash value
+	  (digest).
+
+config VPL_SHA256
+	bool "Enable SHA256 support in VPL"
+	depends on VPL
+	default y if SHA256
+	help
+	  This option enables support of hashing using SHA256 algorithm.
+	  The hash is calculated in software.
+	  The SHA256 algorithm produces a 256-bit (32-byte) hash value
+	  (digest).
+
 if SHA_HW_ACCEL
 
 config SHA512_HW_ACCEL