board: ti: am574x-idk: Add hw data support

Update prcm, voltages and pinmux support for am574x-idk.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/arch/arm/include/asm/omap_common.h b/arch/arm/include/asm/omap_common.h
index 9624fb8..5710136 100644
--- a/arch/arm/include/asm/omap_common.h
+++ b/arch/arm/include/asm/omap_common.h
@@ -597,6 +597,7 @@
 extern struct dplls const **dplls_data;
 extern struct dplls dra7xx_dplls;
 extern struct dplls dra72x_dplls;
+extern struct dplls dra76x_dplls;
 extern struct vcores_data const **omap_vcores;
 extern const u32 sys_clk_array[8];
 extern struct omap_sys_ctrl_regs const **ctrl;