rivafb: Use generic DDC reading

Update driver to use generic DDC reading

---

 drivers/video/Kconfig           |    1 +
 drivers/video/riva/rivafb-i2c.c |   44 ++-------------------------------------
 2 files changed, 3 insertions(+), 42 deletions(-)

index 736556a..a838924 100644
@@ -740,6 +740,7 @@ config FB_RIVA
 	depends on FB && PCI
 	select I2C_ALGOBIT if FB_RIVA_I2C
 	select I2C if FB_RIVA_I2C
+	select FB_DDC if FB_RIVA_I2C
 	select FB_MODE_HELPERS
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA

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