tegra: fix leftover CONFIG_TEGRA2_MMC & _SPI build switches

Missed some boards after my tegra2_mmc.* -> tegra_mmc.* change, and
one instance of CONFIG_TEGRA2_SPI. MAKEALL -s tegra2 AOK, Seaboard MMC
AOK. Didn't test Tamonten, Paz00 or TrimSlice, as I have none here.

Signed-off-by: Tom Warren <twarren@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
diff --git a/board/nvidia/common/board.c b/board/nvidia/common/board.c
index a159deb..fc8b928 100644
--- a/board/nvidia/common/board.c
+++ b/board/nvidia/common/board.c
@@ -94,7 +94,7 @@
 #ifdef CONFIG_SPI_UART_SWITCH
 	gpio_config_uart();
 #endif
-#ifdef CONFIG_TEGRA2_SPI
+#ifdef CONFIG_TEGRA_SPI
 	spi_init();
 #endif
 	/* boot param addr */