docs(interrupt): corrected func name in interrupt-framework-design

This change corrected the function name of determining the type of interrupt.

Change-Id: I88f2464eb16cebc05549267fea5380d0b83feb66
Signed-off-by: lianghong.liu <lianghong01.liu@horizon.auto>
diff --git a/docs/design/interrupt-framework-design.rst b/docs/design/interrupt-framework-design.rst
index dfb2eac..515cf5e 100644
--- a/docs/design/interrupt-framework-design.rst
+++ b/docs/design/interrupt-framework-design.rst
@@ -649,7 +649,7 @@
 
    .. code:: c
 
-       uint32_t plat_ic_get_interrupt_type(void);
+       uint32_t plat_ic_get_pending_interrupt_type(void);
 
    It should return either ``INTR_TYPE_S_EL1`` or ``INTR_TYPE_NS``.