recipes-multimedia: libcamera: Add in SoftISP branch

The SoftISP branch provides debayering and 3a using CPU algorithms. This
gives us a "real picture we can use" on qcom hardware absent the HardISP.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

recipes-multimedia/libcamera/libcamera_%.bbappend

@@ -0,0 +1,9 @@
+
+LIC_FILES_CHKSUM = "\
+    file://LICENSES/GPL-2.0-or-later.txt;md5=fed54355545ffd980b814dab4a3b312c \
+    file://LICENSES/LGPL-2.1-or-later.txt;md5=2a4f4fd2128ea2f65047ee63fbca9f68 \
+"
+
+SRCREV = "b2ef255295871fb6246d99bdd5b41aa65e3fc3b2"
+
+LIBCAMERA_PIPELINES = "simple"