Disable IPA on riscv64

This package is empty.

[..]
RPM build errors:
error: Directory not found: /builddir/build/BUILDROOT/libcamera-0.0.4-1.fc38.riscv64/usr/share/libcamera
error: Directory not found: /builddir/build/BUILDROOT/libcamera-0.0.4-1.fc38.riscv64/usr/lib64/libcamera
error: Directory not found: /builddir/build/BUILDROOT/libcamera-0.0.4-1.fc38.riscv64/usr/libexec/libcamera
    Directory not found: /builddir/build/BUILDROOT/libcamera-0.0.4-1.fc38.riscv64/usr/share/libcamera
    Directory not found: /builddir/build/BUILDROOT/libcamera-0.0.4-1.fc38.riscv64/usr/lib64/libcamera
    Directory not found: /builddir/build/BUILDROOT/libcamera-0.0.4-1.fc38.riscv64/usr/libexec/libcamera
[..]

Signed-off-by: David Abdurachmanov <davidlt@rivosinc.com>

libcamera.spec

@@ -1,6 +1,6 @@
 Name:    libcamera
 Version: 0.0.4
-Release: 1%{?dist}
+Release: 1.0.riscv64%{?dist}
 Summary: A library to support complex camera ISPs
 # Library is LGPLv2.1+ and the cam tool is GPLv2
 License: LGPLv2+ and GPLv2
@@ -70,6 +70,7 @@ BuildArch:   noarch
 %description doc
 HTML based documentation for %{name} including getting started and API.
 
+%ifnarch riscv64
 %package     ipa
 Summary:     ISP Image Processing Algorithm Plugins for %{name}
 Requires:    %{name}%{?_isa} = %{version}-%{release}
@@ -77,6 +78,7 @@ Requires:    %{name}%{?_isa} = %{version}-%{release}
 %description ipa
 Image Processing Algorithms plugins for interfacing with device
 ISPs for %{name}
+%endif
 
 %package     tools
 Summary:     Tools for %{name}
@@ -149,10 +151,12 @@ rm -rf ${RPM_BUILD_ROOT}/%{_docdir}/%{name}-*/html/.doctrees
 %files doc
 %doc %{_docdir}/%{name}-*/
 
+%ifnarch riscv64
 %files ipa
 %{_datadir}/libcamera/
 %{_libdir}/libcamera/
 %{_libexecdir}/libcamera/
+%endif
 
 %files gstreamer
 %{_libdir}/gstreamer-1.0/libgstlibcamera.so
@@ -168,6 +172,9 @@ rm -rf ${RPM_BUILD_ROOT}/%{_docdir}/%{name}-*/html/.doctrees
 %{_bindir}/lc-compliance
 
 %changelog
+* Fri Apr 28 2023 David Abdurachmanov <davidlt@rivosinc.com> - 0.0.4-1.0.riscv64
+- Disable IPA on riscv64 (emmpty package)
+
 * Wed Feb 01 2023 Javier Martinez Canillas <javierm@redhat.com> - 0.0.4-1
 - Update to version 0.0.4
 - Add ExcludeArch tag to avoid building libcamera for s390x and ppc64le.